I just hate having drawing gloves on me when i am sculpting or drawing on the ipad. And since the palm rejection sucks i was looking for a solution. 
This device is nothing fancy, just a piece of rounded plastic that lifts your hand from the ipad about 1,5cm. I put some rubber mat on the bottom so it would not slide around, if you dont have that i guess leather is a good option to glue on. 
 
print it and test it, i put it her more as an inspiration for development than that it is a perfect device. 
it works well for me and i dont need those horrible gloves anymore.