Star chaser, dremel a small hole in back panel on the left side . The sensor scope is 3 d printed , it’s was a gift from Aude , which also
Did a 3-d 3-E return of jedi , boba fett rifle ( thank you Aude). Then I took the periscope that come with r2 , mold and casted it , then cut the top of it out really thin and glue it in the up
Position . The paired the inside panel where I dremel the hole a flat black. On then send one the silver is a piece of thread I bought from hobby lobby and gentle glue it in place. That how I did it Starchaser , hope the info was helpful.