It's been a long time since I built my own great bass and bass recorders. Since then, Shapeways has changed a lot of procedures and policies. Originally, following Shapeways' thickness guidelines at the time, I designed some parts with thin little plastic bridges intended to be snapped off. Then Shapeways complained that they were snapping off (as intended) and apparently stopped allowing me to let others print them. Hence some of the parts that display publicly are in fact not the latest versions. I don't have the time to fix everything at the moment. If you like I can send you the 3d files, and you can upload and print them as your own (+/- modifications). I think Shapeways is more generous with allowing people to print "defective" products if they are their own.