Yep bring it over to Ian Angus he’s pretty good at shrinking and stretching metal . And if that’s you that made them dents I suggest you pay a visit to spec savers. 😂
I can’t see that it can be anything other than diaphram I would check that again and also start it by chucking carb cleaner down the air intake a couple of times I’ve found sometimes doing that will clear things out and carry on running
