The biggest problems we ran into:
1) the forks that came on this thing were off of a cb350. I didn't realize how different the fork lowers were until we went to put it all together, my later fork tubes and springs would NOT fit it. So, if anyone wants a set of freshly rebuilt and painted cb350 forks let me know ;)
2) We planned to throw the wheels and tires from my K7 on there but didn't realize that the early and later K's had different hubs. So, after about a million different tries with different axles, and spacers, and drums, and whatnot we finally realized the left side of the hub was larger on the K7, probably to make up for the wider swingarm and greater offest on the later F and K bikes. So, we would up cleaning 2 sets of hubs.
The hardest part of all of this, and probably of the entire build was that farking bearing retainer. Using TWO spanner wrenches it still took forever to get off. Joe came to the rescue when putting it back on and helped by holding them in place with a board and his weight. The added leverage of turning the board also helped greatly.
3) The center stand spring. That thing is a mother effer. Joe also had another stroke of genius though. (see below)
For anyone wondering how the wide world of sports you get the centerstand spring back on... here's how: