I use a trophy ridge that has a bubble level on the bottom of it. helps my form a little as i can see if i'm torqueing the bow. very good sight
2003 Martin Prowler SE
2011 Hoyt Rampage XT
Trophy Ridge Sights
Crimson Talon XT broadheads
i got a Hamseka sight leveler and found out my Sure-Loc sight/Viper scope was out of whack. got all three axis set now and it does make a difference.
i now level my sight with a sight level....i find it keeps me level.