I'm designing a rocket with a 41.6mm (BT-60) body tube and a 29mm motor mount; I couldn't find any (cheap!) engine retention solutions for composite engines at these dimensions, as all the (cheap!) retainers I could find had an OD larger than 41.6mm. I found a great model on thingiverse (https://www.thingiverse.com/thing:3691731/files), and I was wondering if it's feasible to do something like this in PLA filament. Will it melt?