Technasonic Check-Go Pro Sweet Spot Electronic Golf Ball Liner

This is a great product and I don't think it matters much where you buy it from as long as you are satisfied with the price and as long as it is new. I just wanted to clear up 2 misconceptions I've been reading among these reviews.1. A small percentage of the time, cetainly less than 10%, you will encounter a golf ball where if you spin it and mark it multiple times you may find that that specific golf ball has 3 or 4 different axis. This is simply a case in which the center of gravity (COG) is so close to the actual center of the ball that the device cannot make up its mind about any single axis. This is not a fault of the device, it's just that some golf balls are near perfect. When this happens, you can be pretty sure that you've got a golf ball that needs no orienting on the green or off the tee. It's not rocket science, it's simple physics. So any claims that this device will actually show multiple axis, this is true, but only a small percentage of the time and on near perfect golf balls.2. With regard to the pens running out of ink, I tried buying some Sharpies or a similar brand called MaxPen Ultramark. After trial and error what I can best recommend when your OEM factory pen starts to run dry after a few hundred balls is that you obtain 3 things.a) A 1 oz bottle of Black India Ink (available at WalMart for about $4.)b) A hypodermic needle (in some states you need a prescription if you can't talk your pharmacist into giving you one.)c) A pair of small needle-nose pliers, the kind that are bent 45 degrees work best.With the needle nose pliers gently extract the felt tip completely from the pen. It's about 1.25" long. Using the hypodermic needle take a small amount of the ink and inject it into the body of the pen. It's a very small opening where the felt tip was removed, so a hyponeedle works best. Just a few drops or maybe a milliliter will do. Reinsert the felt tip with the needle nose pliers. It should work as good as new. Because the felt tip is so long it should last forever or until you lose the pen. I have tried this on Sharpies and other store-bought permanent marking pens and they don't seem to have the right kind of felt tip made out of the right material. I tend to get a buzzing sound from a Sharpie when the felt tip comes in contact with the spinning ball and a line on the ball that is blurry. The factory supplied pen is engineered properly and is quite conducive to painting a nice smooth line on a spinning golf ball. You can spend $15 or $16 to buy five replacement pens from the manufacturer if you want to. This is just a cheaper alternative.All-in-all this is a great product. Personally I take Ralph Maltby's advice and check all of my golf balls with Epsom Salts first to weed out the balls which are badly out of balance. I am guessing that 3 balls in 10 are badly out of balance. See Ralph Maltby's video on You Tube to understand this process. Those balls end up in my shag bag. The balls that pass the Epsom Salts test then get cleaned thoroughly to remove all of the salt and then after drying I spin them and mark them one at a time using this product. Great product!

Didn't find any balance points of 20 different balls tested. I had it on a level surface as the instructions said to do and replaced the batteries with brand new premium batteries. The balls just wanted to bounce around under the top. I tried to hold the product and the balls stopped bouncing but there wasn't any consistency in where the "balance points" were when I tested a few balls multiple times.

This product is given unfair reviews.It works fine BUT with some modifications.I will include pictures…I added a 2nd hole for regular size Sharpie markers to fit.I have tested the accuracy against the pre-made hole & it is perfect. I have also repeated making lines on balls multiple times with identical results. See pics:If you notice smearing on the red ball, this is because I tried to stop the spinning with my finger, and I smeared the ink by accident.

The Check-Go Pro is a slick little tool that really does what it promises—finding the true balance point of a golf ball. It’s surprisingly accurate and super easy to use. Just pop the ball in, hit the button, and it does its little spin magic to find the sweet spot. Marking that line has definitely improved my putting alignment and consistency off the tee.My only gripe? It doesn’t play well with Sharpies. I wish the marking groove was a tad wider or deeper to accommodate them since most golfers already carry one. That aside, it’s still a very useful tool that adds a nice edge to your game.If you’re serious about getting every advantage on the course (and don’t mind using a pen that fits), this one’s definitely worth it.

If it truely found the sweet spot on a golf ball, it would always spin and stop at the same spot. We'll it has yet to do so in my experiance.

I heard about this from my golf pro and decided to buy it to see if it really makes a difference. This is what I think of it:PROS:1. We have all hit golf balls that seems to have a mind of its own. What I have seen is that my ball sometimes flies straight on the way up then curves to the left or right. Or it wobbles in the air like it is trying make up its mind where it wants to go. I used this to draw a line on my ball where it is balanced. I teed up and hit the ball and I have to say that it does seem to fly straighter.2. It is easy to use. put your ball in and press the button until the light stops blinking. That is the time to take out the pen and insert it into the hole and it will draw a line on the ball.3. I use it now to see which of my balls are so oblong that they have several balance lines. I will use this on a ball twice to see if the lines are overlapping or the ball creates another line. As long as the second line is not far from the first line, I consider that ok as it could be the way I was holding the pen. But I have tested several balls that have line going all over the place. And one of those balls was the one I was using when I shot a 110. That thing would be impossible to putt straight or drive with. This doesn't make as much difference on irons or woods as they don't fly as fast as a driver. But putting really made a difference. So use it to screen the balls you are going to use is the best use of this.4. Putting with this line on the center really helped me. Just point it to the direction of your putt and see the line on the ball as it rolls. It is there you will see how important a balanced ball is. I tried an unbalanced ball and it could not keep rolling on any of the lines on the ball.5. On the top of the ball Ball Guard, there is an opening where you insert the pen to draw the top of the ball as it rotates clockwise. It is important when you Drive as you need to point the dot that you drew on top of the ball facing you when you drive. Then aim the line of the ball to your target and hit your ball.6. After playing 3 rounds with a balanced ball, I can say that I am sinking more putts and hitting more fairways.7. You can turn it over and use the bottom to redo the lines you have already drawn in case they faded.CONS:1. I really cannot think of anything.SUMMARY:I love this device and it does help me weed out bad balls so that I have confidence that I have removed the oblong balls from my bag.