For those of you who do not build little engines, there is one big hurdle that model builders face which has not been resolved. Many (most?) of the old engines ran on a magneto which automatically kicked out a spark to ignite the fuel. Magnetos do not scale well, so most of us rely on a battery, coil and condenser to provide our engine 'spark.' Vietti came out with a small magneto, but it needed some 'tweaking' and apparently he did not have time to improve its performance? Don has done that ... so while this model is a real nice one, pay attention to the magneto.