First ever build was the Spectre SI15. Build guide said to melt a brass threaded insert into the lower. That way the pistol grip would be screwed into metal instead of plastic.
Reading the Ubar3 guide, Ivan chose to tap threads into the lower. I trust Ivan’s judgement because he’s been polishing the ubar for 10ish years. In my mind though… the brass threaded insert seems like it’d be stronger since it’s metal on metal. Harder to strip out the threads etc.
Thing is… with Ivan’s method you can use the actual screw that’s meant for the pistol grip. If you use the threaded brass insert. It’s a much smaller flanged screw. I’m not sure what to think.
Would appreciate thoughts/advice.
So I read into it. Ivan’s read me says he didn’t use brass threaded inserts because his tests showed the inserts removed too much material which made the print weaker… im not sure if he’s using the original screw that came with the grip or not. I think could use a m4-m5 screw and it would solder right into the preexisting hole? It’s a much smaller screw though. Not sure if that’d make it weaker.