Another bike I used to have, well almost anyway. I bought a frame and swing arm for £50 many years ago and got hold of a Bonnie lump to drop in it, a very tight squeeze by all accounts from those that managed it. As usual fate decided to give me a bit of a slap and I lost my job, so that project and a Bennelli 354 sport had to go to pay the bills. They vibrated quite a lot according to reports at the time, but I would still have liked one. If you could find a frame(not much hope of that though) I reckon they would take most big singles and make a nice little bike.
Jez