> PLA is not strong and doesn't like to warm up in the sun "Strong" is ambiguous. PLA is stiffer than many other thermoplastics (resists bending loads well), b

> PLA is not strong and doesn't like to warm up in the sun "Strong" is ambiguous. PLA is stiffer than many other thermoplastics (resists bending loads well), but it's not as tough (impact strength is poor/it's brittle). PLA becomes even stiffer and resists higher temperatures than many other thermoplastics if you anneal it. You want stiffness in a telescope because deflecting under load moves your optics out of alignment. A telescope has moving masses as well, so stiffness along all axes under load is important.