I used petg to print a proto type box for a compass we mounted to a autonomous boat. Turned out good enough I never ended up machining one out of delrin. It won't last as long, but I can reprint a new one while I sleep and it's in a cool translucent green. Lol.I don't have a printer just yet, but plan on getting an ender 3 in a bit and try to build a bracket for an alien like light. (basically 3 Orcatorch 520s on a goodman handle) Will try PETG first but figure worst case if that doesn't prove to be strong / durable enough can just prototype using the printer then get it machined out of Delrin by a mail order firm. Fun what is possible these days.