HI Fast Eddie
Sent them an email yesterday, hope they reply, they may be on holiday as Australia Day here!
Set the frame up on my table to do some real measurements and found that with the bottom rails flat to the table the engine is tilting back about one degree, the steering head rake is 27 degree, should be 28 and 4.3" trail, this wasn't an accurate measurement as I need to find where I put my bar that goes in the steering head, only checked the outside of the steering head housing.
The swing arm is either twisted or the frame is, so next step is to machine up some accurate mounts along with a longer 5/8" stud so I can set the swing arm pivot bores up parallel to the table then I can check all other dimensions relative to the swing arm bores.
I may have to drop the front down a bit to get the engine looking correct, which will alter rake and trail, not sure if a good thing or bad at this stage.
Anyhow lots of fun, 43C here to day which wasn't much fun
beers clod though.