Awhile ago I built a rack for my bps. The three that are in quarantine will be coming out within the next week - week 1/2 and I plan on putting them in the rack with my original BP. I tried to set up the tubs today to get a feel for temps and realized that i forgot spacers. The rack is melamine with the shelves screwed in and the tubs fit VERY tight. I have to push them and they get stuck about half way. I don't really know any other way to fix this than completely removing the shelves and screwing them in again with spacers, but that seems like a pain. Any ideas?