I am really happy with my Brillelli 36cc with the pitts muffler. Brillelli is no longer in business, so getting a new one isn't really an option. The good thing is it is a Poulan chainsaw motor, so parts won't be an issue. The carb is side mounted but angles downward... or to the top of the cylinder which is inverted. I did have to cut out the side for the carb, but it isn't a large cutout and makes activating the choke pretty easy. I did have to do just a bit on the bottom of the cowling so the plug cap would fit... but just the a tiny amount. It was as if this engine was made for this model... a very nice fit. Just a FYI entry here. I like gas. I'm not crazy about glow. I like to fly. I don't like to clean. But that's just me.