Did some checking and found out I was only drawing about 12" of vacuum at idle and the canister isn't responding till 13" is applied. Talked to Don. He had me run the initial up to 30 and see how much vacuum I was drawing. Still 12" at 900 rpms. Have to go to 950 or 1000 to get 13". In any case he mentioned sending it back to him to rework the can.

Interesting thing is, even with 30 initial it fires right up - no kickback.