Thanks for the comments guys.
Yesterday was crap because it promised to be a good day of kart work, but failed to be!
Got a call off Total Engineering Developments saying he was rushed off his feet but he'd managed to mill the flats in the st/st bar I'd given him, and would I mind if I finished it off by putting the drill through it and tapping the holes back at the workshop on our lathe. I was fine with that because the flats were the parts I didn't want to do because out mill doesn't have an indexable head on it. By the time I'd worked until 12.30, swung by T.E.D. and stayed there for ages talking then got home, changed and down to my workshop it was about 2.00

by then after I'd cut the ends of the bars and faced the surfaces up I couldn't find a 10.8mm drill for the M12 x 1.25P LH/RH taps. Naff!
So heres the bars in unfinished format, I've ordered a drillbit:
1 of the new axle bearings:
Was annoyed so I cut a rear tab off to see how the new ones would look (roughly)
Before:
After:
Bear in mind that last pic the plate was just sat atop a weld so its no-where near where it needs to be
Will update after I get the drillbit
Jordan