You say 'Clasp' does that mean you are clamping it on the tree?
I think it's better to have it free to rock on the tree. I have a curved surface to support the bow (with a rubber covering), you hand doesn't clamp the bow, it supports it.
I must admit that my bows can look different in the hand too, so I check 'em in front of a mirror or a big window or get mrs Cat to take a pic of me at full draw etc... anything that helps.
Del