I looked at the Husqvarna tonight, the deck is missing a large section of deck under the discharge cover. It'll live on through other mowers. The handle is the same shape as Husqvarna based Craftsman mowers, but has a curved top like higher end mowers, so I'll find a nice Craftsman to put that on. I'm pretty sure all the Quantum needs to work is an engine brake cable. The ball bearing wheels may end up on my Homelite, and the adjusters are nice so I'll see if they can be swapped over to a basic non adjustable deck without much trouble. Too bad though, it is a very light weight mower, and with a Quantum it would have been a very nice machine.
I'm having the same problem now as last year, everybody who needed a mower at the start of the season now has one, and I'm left with three mowers for sale, and one soon to be ready with no replies at all. I think I'll wind down the season's work and stop actively looking for more to fix, and break down everything I have left for spares. That way, I can focus on repainting and repairing all of my keepers, and work on the damaged deck on the house that I haven't touched yet.