What, if any parts have you changed?
What were the results?
I've never had any malfunctions with my 36. I put a Wolff non captured rod and stock weight spring in it after approximately 500 rounds.
It has gone through many rounds after that. Stock other than the Wolff rod and a Wolff stock weight service pack.
What does the extractor hook look like?
Is it polished smooth or is it "sharp"?
I'll wait to ask more.
The Evil Captain Kirk