Billy -

I am going through a similar switch, although I am using the Grip Loc system rather than the Turbo or IT.  I also am very happy with the guy that is now drilling the balls and had only minor problems with the standard slugs.  That being said, I now have two thumb slugs that I have used one for the hotter summer months and one for colder weather right now.

I really like the option of having the two choices.  Might be my own physiology, but there is a definate difference depending on how my thumb is reacting.  

My two cents.  Costs some to switch the sleeves over though, so may not be worth it for you.
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299 - Roto SD-73 Classic
 299 - Elite Black Label
 298 - Roto SD-73
 297 - Brunswick C 3.5

If my thumb wasn't so sensitive to fit changes, I wouldn't use the Vise IT in my equipment, but I feel as though I have to. I would love to save that extra money it costs to have it installed every time. Also, I also understand that there is more core taken out of the ball as well, but I've also read where manufacturers are accounting for that now when they make their cores.

my pro-shop guy uses the 2n1 switch grips and i really do like them.  I mean I'm kinda anal about how my thumb hole fits, so this was a perfect option.  

and yes my thumb does swell, at the beginning bowling season..  so switching from the smaller thumb hole to the larger one is very nice....


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" Lift Your Skirt Grab Your Balls and Learn How to Bowl "  

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Very valid points, thanks everyone for replying.

At the moment, I'm going through equipment like I go through underwear.  I'm only 18, and I'm starting to learn more and more about cores, coverstocks, layouts, I'm still finding what types of balls I succeed with.  With the 5 balls my new pro shop guy has used, I have only had to put in 1 piece of tape total between all 5 balls.  I just wanted to hear everyone elses perspective on my situation, thanks to all who answered again.

I had major thumb issues until the pro shop guy FINALLY ordered oval thumb grips, made all the difference in the world.

I've been using the Vise ProV II oval sleeves for a few years now. I liked the way they feel.. Was thinking of the IT but don't want to fork out that kinda money to have 5 balls redone at this time. So my new driller and I decided we'd try a thumb MOLD and go from there.. Have to say I'm liking the mold so far.. Been 2 weeks and it feels nice, looking forward to getting the next one done..
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Jeff