Hi folks, back into RC after a 10 year hiatus. I picked up a 77" Goldberg Extra 330 ARF and want to tryout some 3D flying. I prefer 4-cycle engines. However the engine types the advertisers seem to be recommending for what seems to me to be all of the 25% ARF models similar this one, is either the 1.60 2-cycle at about 3.6 HP or a gas engine in the 4 HP range. Are there any 4-cycle options and would the 4-cycle option you may have in mind support a smoke system to potentially be added to the model later on......thanks

dave in Maryland