Hello, my first post here. My wife just turned me onto this site and I'm already hooked. I do a lot of rubber stamp carving and it looks like you used a speedy cut block, or possibly a carving block from Dick Blick. I would recommend not using Speedy cut or the Dick Blick stuff, it's far too crumbly and will not wear well with repeated use. I would recommend using PZcut, the white kind, which is available from stampeaz.com. I am in no way affiliated with Stampeaz, I just love their product. I'll upload a recent carving soon, must get sleep now.