My 6000's and multicontroller arrived last week as well, and I'm very impressed with the build quality. I haven't put them in a tank yet (since they are for a new tank that I don't have yet), but I'm very impressed with the build quality. If they perform like my other Tunze gear, I'll be a happy camper.
FYI, you can get Tunze mounting hardware for just about any tank solution. The kits for the various types of tank trim aren't expensive (less than $10 from most places).
www.marinedepot.com carries the whole shebang. I'm sure J&L can get the mounting kits in as well.