most of the greatest 3D shooters in the world shoot 3u, I think there's something to it. 

Those results speak for themself.  Keep up the good work, brother! 

Welcome to the club! I made the switch this last spring. As others have mentioned, shooting really accurately is just more fun.

I not only shoot 3-under, but do so with a glove 
Double heresy!

Great to hear and see! I had the same thing happen to me. I will still practice split finger and instinctive. But, when I went from a 6 inch group with the occasional flyer to a 3 inch group with a rare flyer @ 20 yards by switching to 3 under and gap shooting, I knew what I had to do for hunting. It's also fun when your point-on is 30ish yards and you hit it fairly consistently!

Ive tried couple different times, just cant seem to catch on to it. I know its more consistent and accurate , wish I could figure it out.

That's good shooting! I've been thinking of switching also. Push archery has a good video out explaining a interesting gap/string walking hybrid way of shooting. Here's the link if anyone's interested. https://youtu.be/1E1vKkSSoNs

I'm working on the switch myself but finding my anchor is difficult

Whatever works for you!