Hello everyone,
I am backing a bow with snakeskin and I'm wondering if any of you have ever experienced an increase in draw weight when you used snakeskin.  Perhaps if I prop the tips up and tie the handle down or something so I can glue the snake skin on when there is some backset applied to the bow and it will act as a parry reflex?  Any of you have experience with this? Also, the bow I want to back with the skins is a bow that is already finished and sealed.  Do I have to sand all the finish off before applying the skins to the back? 
Thank you for your help!