Anyway - I *think* I can get just enough movement on them if I get this arm removed (see pic) (plus I need it off for the other side anyway).
Anyway - is there an easy way to remove this arm ? I have tried coaxing, kind words, profanity, brute force and WD40(the super weapon).
Is there a trick to this or is it 'hit it with a mallet' time ? (laughably it was held on with one nut and one castle nut. Why is a mystery - it is absolutely rock solid with no nuts on at all !

Realize I am posting lots of questions, but I'm (trying to) doing lots of work on her at the mo !
Thanks for patience.