Ok soooo
With very limited clearance in-between cage and roof made a basic diy pimple dolly....drilled hole, tested on bench with pick hammer with spare roof section which worked ok. Could not really get anything much wider or thicker in the gap.
While fine off the car the previous attempted repair on roof on closer inspection had a bit of a small hole/tear and metal very thin in the centre area even with slightest tap of hammer could tell it was not going to end well.
So I went to my plan A and got welder fired up and with a fictitious voice of
@Steve Swan in my head making a mmmmnnnnn you sure you want to do that and not just move the dimple somewhere else




With a short blast as it cooled a distinctive pop noise.....followed by panic check was a bit better
Proceeded to get hands on with it and have a good feel

mix of slight hammer and dolly and 3 more spots, flattened the welds with finger file and no more poppet....I would say 94% as it should but felt quit while ahead and once skim of filler and roof lining in not sure anyone would notice
I also got my flattened 22mm copper tube folded over and welded up the couple of holes that had not survived the plug welds, few more welds on lower mounting section and went looking for any minors....not torture you with more screen pics but ready for hydro80 and primer (forgot to wash brush last time so that's ruined lol)