Hello mates
I have a miche team triple chainset with aluminium chainrings ive recently installed a new chain after about 1500km the bike is second hand and ive done about 1000 km myself with stock chain, the wear was past the limit i think according to Sheldon B. New chain is campagnolo record and its not skipping any spockets by now but makes some cracking sounds when under tension to middle and lower chainrings which they seem medium wear or more for the lower, the outer is not.

Now what i was thinking. Ive tried to swap sides to middle and lower ones but i saw it has a some space around the fixing bolt so it gets inside of the chainring and when swapped the chain touches by little the five bolts.
Can i do anything like drill some space with a dremel around the hole from the other side? Is the ring enough thick? Or i should not bother for now? But the worn rings wont they wear the new chain?
I also can see the chain gets lifted a little when loaded which does not happen whe swapped.
Would like some oppinions, thanks.