I printed a Orca 15 upper in Polymaker PET-CF and the clamshell barrel mounts slide in/bottom out inside the upper easily with just gravity, no pushing or hammering. Seems like the hole in the upper that the barrel mounts go into is slightly too large.
I've calibrated everything and I'm using the barrel mounts from Hoffman's kit. I previously printed the upper in PLA and that one had a nice snug fit, but this PET-CF one is quite loose.
Any suggesstions on what I should try or settings to adjust if I have to re-print the upper? I'm using OrcaSlicer if that matters.