A buddy of mine is thinking of developing an Apple Pencil eraser. He basically wants to replaces the existing cap with one that also has an integrated clip. I suggested it wasn't that big of a deal for people to simply use on screen software to erase. I told him I'd ask around various forums and see what Apple Pencil owners felt. To me, it's a nice to have, but not a must have. Would you buy a replacement cap if it had eraser capabilities?