Things you will need: Rubber stamping mat Hobby knife Ruler Pick Pencil Patience Go to AC Moore or similar type craft store and ask for a "Rubber Stamping Mat". Not a pad. A mat. The pad is what holds the ink. A mat is used as a rolling surface. They are 8mm thick and the PERFECT consistency for hopup nubs. As you can see I cut a 5mm x 6" strip of rubber mat. Now is where the patience is needed. Good thing there is plenty of rubber mat. I cut 20-30 before I was happy with the end result that functioned with my hopup. Like a moron, I didn't take a pic of the final hopup assembly. When I set it and it looked amazing, there was no way I was pulling it back apart. This would make a great base material for anyone who is looking to make any shape, length or height nub. It is tough but flexible. I only have about 100' out of a window at my house. With a quickly adjusted 9×24 scope and quickly dialing up the hopup I was getting incredible groupings. The shots looked like a pitcher's baseball that "boosts" half way to the plate. The trajectory looked amazing with no stupid hook in a general direction. I can't wait to get it to some longer distance opportunities.