Pool filter retaining ring

This is a spare filter retaining ring for Bestway “SAND FILTER / FILTRE A SABLE / SANDFILTER / FILTRO A SABBIA / ZANDFILTER / FILTRO DE ARENA / ПЕСОЧНЫЙ ФИЛЬТР Model / Moèle / Modell / Modello / Model / Моделъ #58497” for garden pools. I whipped this up for a friend after he had his original ring blown by freezing water inside the filter house. This is a trivial model apart from the thread. It's almost ISO M140x4 but smaller, more like M137.5x4 - not a standard thread. I had to define it as a custom thread in Fusion 360. The result worked like a champ at first try: It fits perfectly - you can give it a spin and it rotates to the bottom, yet there isn't much play between the threads.Boost MeI mainly design stuff for myself and occasionally post them just in case someone else have use for them. You could want to spend your boosts on people with *really* cool ideas or designs (I try to give them to makers who don't have thousands of downloads already) - but having said that, I