Filament shelf bracket for Multiboard

A sleek bracket for building a filament shelf out of 20 mm plastic tubes and mounted on a multiboard. Will accomodate both regular and small spools.You will need:Two plastic tubes (electrical tube or any tube or shaft/dowel) with 20 mm outer diameter (about ¾ inch).As many bracket as you deem necessary for the weight of your filament spools. A spacing of 50 cm should be sufficient.UPDATE: One 13 mm and one 20 mm small thread multiboard T-bolts per bracket. Plain head or flat head is your choice, but plain head on 20 mm bolt is recommended.I updated the recommendation to T-bolts because I had two bolt sheer off leaving the shelf hanging precariously. The regular bolts can't take the weight. So if you don't want your shelf come crashing down, switch to T-bolts and do not overtighten them!Print flat on it's side, no supports needed.Print with the plastic of your choice, recommended is PETG with 5 walls and 20% infill.UPDATE:A variant for 24 mm shaft/dowel has been added.Varian