Terry says he rents the trailer from Danchuk Trailers in the BCR; he confirms it is about 6x6, fibreglass-shelled, and easy towing, though he says it bounces a bit when empty. Terry has pulled that unit for a few thousand miles now, at least, so the fact he goes back to it pretty often is a testament to it's suitability for the task; he is able to satisfactorily tie down not only his 650+ lb BMW touring bike, but alternatively also his 999 Ducati, which, with it's low and narrow bars and full fairing, would challenge many trailer's tie down routines. You'll be ducking, of course, where Terry and I can move without thought...
The one thing the trailer does not have that I like is a window at the front (or at the back, I don't think); I do find it a comfort to be able to tell everything is straight and immobile at a glance - another small point in favour of getting it into the back of the truck. You'll likely remember from crating your Flathead, I perhaps overly-incline towards granny-panties deliberation in areas like this...
