2012 BMW 328i  3.0 n51b30 motor

Hopefully I’m within the guidelines just looking for some advice, the rounded bolt I’m stuck on is the left one in the second photo, the first image is for context regarding space to work with. 

These bolts from what I understand are soft and one time use and I believe the last owner didn’t change them and the dumb new owner rounded em off even more 😅😅

I tried the etorx first, i tried hammering on extractor sockets, I tried getting some pliers or vice grips down there to just caveman them free, but with the space I couldn’t make it work. I even tried the sacrificial socket jb weld technique, never had to use jb weld before as I know what that typically means lol

All that I’m left with now is buying a Dremel with a small cutting wheel and trying to cut around that area to atleast be able to free up the valve cover and subsequently the space to tap/drill/ezout the bolt this method seems a bit drastic but as an amateur trying to get into the field I’m not sure what my next options are

I’ve got the replacement cover with the new bolts so not really worried about saving it, more worried about damaging what’s underneath

TLDR: bolt on the valve cover in a tight spot started kinda stripped and I made it worse and am looking for advice before I go sicko mode on some plastic

Any insight appreciated and welcomed 😭


Rounded valve cover bolt in tight area