more progress but a little slow.
made more brass brackets and fitted a solid line for the cables to power the grinder, and then run out of paint......

Need to do something about the wires on the bottom arm as I think they look like C@#$p.
also want to widen the track base by about 15mm each side, will be easy enough to make some spacers up and longer bolts.
But that's a job for tomorrow
cheers andy