I was stripping my chainsaw and thought "@Memmeddu would be the man to fix this"....Destroyed my just arrived onevan drill while disassembling it for you.
Review delayed to tomorrow as I'm getting upset.
I can only tell you lots of thread locker and stupid screws.
I've attempted to drill out the small M3 screw but unfortunately got off center and despite I've drilled more than half screw diameter out it doesn't come out.
I've tapped the wrong hole it would held but not happy right now and missing the enthusiasm to proceed any further for today