I have a basic plastic stock. It shoots good enough for me but the grip is a little to small for me. I am planning on adding something to fill it out about 1/2-3/4 an inch. what should I use.I have heard mouse pads, pipe insulator, and yoga mats. I was thinking 550 cord followed by gaffer tape. What have you all used that worked well? also I have seen some put a grippy looking texture to both the grip and for-end. What is that is is a spray or something more complicated?

Thanks