API Aquarium Test tube Rack

Designed this to hold API test tubes for API fresh water or Marine test kits. There are 2 versions one for 4 tubes and one for 5 tubes. i designed it with a gap and small lip on the bottom section so the tubes can be inverted and used as a drying rack I think it works well. I printed them laying down as shown in the photo. I used tree branch supports, not sure how it will print with out supports. Sliced with Cura 4.8 with .2 layer height and a CHEP profile