success !!
ok so this is how i got my friggin tight fill bolt undone... i used the 1/2" ratchet, put it into the fill bung and let the handle of the ratchet hang down, i then put this electric scissor jack (like the one standard in skylines, but electric) between the gearbox cross member and the ratchet handle, holding the jack with the left hand, my right hand was controlling the up/down switch, started to open the jack, forcing it against the ratchet, within seconds the fill bung cracked loose.
didnt strain myself or graze any knuckles in the process lol
so the 3 litres or so of the old fluid is out, and 3.8 litres of redlight shockproof (blue) went in