I had a lot of trouble with Don's distributor initially. He had my full engines specs, and built it as I described. When I got the distributor, I could not get the engine to start. After running down the battery for the 3rd (!) time, I finally figured out he (they?) had installed the reluctor in the wrong position, Grrrr!! I disassembled and repositioned it, and the engine fired right up. Best part is that I was made to feel like it was my fault somehow... But at least the reluctor chewed up the magnetic pickup, and I had to retunr it for a rebuild after about 500 miles. I still can't figure out how the reuctor could have been off like tha if they had fully tested it.
Anyhoo, that is how he built it based on the specs I gave him. It actually is pretty strong down low, idles at 850 with ~10 in vacuum. Like I mentioned, I would prefer 20 initial, and may try for it eventually.