I looked for an appropriate thread to post this, with the hope of a high rate of expert suggestions. This dilemma could span many forms, so If not appropriate here, please move it.
I am trying to remove these 3/16 set screws, a 5mm wrench seems to fit tighter. I have 3 of 6 removed, but I am afraid that I am going to strip the remaining ones. So far I have tried.
1 - PB Blast, Lots of it over several days.
2. Heat, till the bottle was empty
3. Taping with a hammer.
What I haven't tried yet.
Removing the mandrills from the deck for a better angle of attack.
Fabrication of a tool to allow the use of an air impact wrench with the 5mm bit.
Trying to pull the pullys without removing the set screws.
After the inevitable stripping Drilling these out.