Cool Beaky I heeded your advice steered away from thew Rdog....
and managed to score an almost mint Sys11A board out of an F14 ,
No acid damage at all which is rare for these it seems...
even has the Williams F14 proto roms mY machine would have originally come out with!
Hooked it up to 12 and 5v and it boots and passes the memory test etc...
good to have a win every once in awhile...
Peter..