I finished up my 42cc conversion and was able to keep the magneto ignition by keeping just enough of the saw case to keep the coil in the proper position. I did a little more trimming to the case since I posted the photos. I’ve test run it twice on a test stand and it runs and sounds great. I have not tached it though. However, it is quite heavy as I did not trim the flywheel or do any of the typical things to loose weight. It has the 11.11mm carb and stock chainsaw muffler. I mounted it to the plane that used to have the flywheel/magneto Homelite 30cc and after adding 5 ounces of tailweight to get it to balance, it came out 2 pounds heavier than with the Homey. I still need to test run it and tach it on the airplane, and if satisfied, I’ll try flying it. However, I’m thinking that I may go with the gas/glow setup. How much weight could I feasibly loose by doing this? Is it possible to get it down to what the flywheel Homelite 30cc weighs? If so, I could remove the added 5 ounces of tail weight. I’m thinking that the portion of the saw case I kept weighs around 5 or 6 ounces also. Does anyone know how much the flywheel/coil/spark plug assembly weighs on a Poulan 42cc? Obviously, what I’m trying to do is replace the 30cc with the 42cc for more power and keep my flying weight the same or very close. I guess I need to order a glow plug adapter, an OS four stroke plug, and try to get some 10/10 glow fuel. I hate to buy a gallon of 10/10 since I have 4 unopened gallons of Omega 15% already, but if I have to, I will. Am I forgetting anything else?