I built a couple of Heath and Knight kits as well as a Dyna PAS-3x in the 70's. When I think of the packaging of the parts and the detailed instructions I could never figure out how these firms stayed in business as long as they did. Plus all the customer service hand holding for builders that didn't know which end of a soldering iron to hold............These were a money looser for Mc since they ended costing more than factory assembled so less than 200 were made.
Ron-C