Spit:

I'm sure Jim intended to say his NiCads were wired in parallel, series would be over 3v at full charge, bye-bye plugs.

Smoke? The twins are delivered with a pressure nipple on one pipe only. get a second with the nipple (you need the one for 10mm thread) and use the first for tank pressure, the second for injecting the smoke oil. It will not affect your engine run.

Bill.