Hey y'all, I'm needing to make a decision on what rail buttons/guides to use for a 54MD rocket. I've considered using fly-away guides but have opted for permanently affixed options. I have printed my own a few times using PETG material and haven't had one fail yet but I also haven't pushed one Mach2+. I'm concerned they wouldn't survive. Does anyone have any good recommendations on such a guide that is preferably conformal, surface mounted and is durable enough for higher Mach flights? Has anyone flown PETG printed guide to high velocities? I generally attach my surface mounted guides with Proline.