As I am little by little dismantling my 7U, I am anticipating repairing damaged threads. Any preferred types? I remember a certain kind that had I think four little "stakes" to lock the insert into the oversized hole. I've used heli coil but not super impressed. Some inserts also are quite "thick" if that makes sense, which limits their application. Just pondering so I can start looking for when this all goes together. Thanks

Time-Serts work the best for me. I dislike heli-coils. The thicker inserts use the four locking pins you are talking about.
I exclusively use Time-Serts and for replacing helicoils I use Big-Serts.


Regards

Phil

They all have their place, depends on what your trying to achieve and the application.