I was interested in the eraser part, but I thought that there might be something at the art store that would do the trick. I bought an empty felt tipped marker (15mm) by Montana. I opened it up and it it's not the device shown in the video and exploded view then I'd be shocked. It looks like they replaced the sponge o-ring with three o-rings that won't melt in acetone and they added some tape tby sporkboy - Polymer Working Group