Went to replace the brake pads, front of the HardBall. Got half way there. LHS all went OK,
RHS the Allen key felt a bit sloppy in the head of the pad retaining pin. Adding some coarse grinding pace to the head of the allen key tightened it's grip up in the fastener but not enough to get it to shift. I sprayed some penetrating oil around the head let it soak in for half an hour and went back with a socket mounted 5mm hex key and an impact driver. No success. I pulled out the heat gun and heat cycled it half a dozen times, heating the calliper around the head of the retaining pin then spraying in penetrative oil. That didn't help, so I brought out the eucalyptus oil and tried again. That resulted in rounding out the internal hex.
OK, time for desperate measures, pulled out a socket mounted 7/32s hex and drove it into the rounded head . All that did was round out the internal hex in the head of the retaining pin completely. That's where it stands at the moment.Tomorrow I take the calliper apart and see if I can shift it with vice grips. I have a spare retaining pin, but might be pissed off enough to get some stainless 10 mm bolts turned down to match the pin but with a normal bolt head. I might have to machine the calliper so the area where the bolt head will sit is flat, could be fly cut on a lathe but a mill would be better.
Dunno, see what tomorrow brings. It will all go back together with anti sieze on the threads.
If I get some normal bolts turned down, would anybody here be interested in a set?