Dry filament storage boxes

As wife has a lot o different filament colors she needed dry storage. We tried solutions where you feed directly from the box but the results weren't encouraging. A much simpler solution would do the job too.
To prevent the spools getting contaminated with silica gel they have to be slightly above the bottom. I achieved that by placing them on a DN32 HT-pipe which is held with two brackets at the side. These are held by two M6 screws and locknuts.

As boxes we used the house brand of a home improvement store, Bauhaus, which is only in D, A and CH. Their boxes are sturdier than the usually used IKEA ones plus they also ship them whereas IKEA doesn't do that any more. The Regalux Box Clear S is just the right size for four spools.
Unfortunately no clips are available for that size. One can modify the ones for the larger versions with a glued on spacer but they are a pain in the but to clamp on. That's why I designed my own clip. It might actually better to use 6 narrower clips (20mm)