With gasoline you must power the glow plug 100% of the time. This is really no problem. Not much weight gain with a couple of 1800mah nicads wired in series. Still lighter than the mag or electronic ignition. I want to run this system for awhile to see how reliable the full time glow is. If the glow plug dies in flight, things might get interesting. One of the reasons we go to gas is for more reliablity.