Oh, didn't know you're on this forum! Thanks for the info! The design looks great. I'm going to try with PETG and see how it turns out. Not sure my extruder is up for pa12 nylon but now I might have an excuse to upgrade it!i originally printed a few sets with PLA but they were not strong enough, after some heavy vibration and exposure to sunlight they eventually give. i then tweaked a bit the weak bits and use pa12 nylon instead, now they are there for months and working great!