Here's my attempt at the Phase 2 heavy Clone Helmet from Star Wars. Just use the exploded image for the placement of all the details, you'll need 2 ear greebles, one of each strip detail(L and R), the visor guard, one of each rangefinder(L and R), one scope and one chin detail. I'll have assembly and painting instructions up sometime. I scaled up the files to 470%.
Just an FYI this uses the same base helmet as my animated style clone helmet(link if you want to print that, https://www.thingiverse.com/thing:4914122), here's my version of Rex's helmet https://www.thingiverse.com/thing:4914130
Edit 8/22/21-Changed the shape of the sun visor piece

Be sure to post a make and check out my other models.