I use a cowling for the Rotax engine, intend to be used with a long propeller spacer. With the D-motor in a forward position, there is a limited space for the big size, 400x200mm, Rotax radiator. I have to open up the airinlet, and prepare for fiberglass work. I have fabricated temporary radiator brackets, today mounted with clecos, to find a good position. Oilfilter, and the right side muffler makes the limitations.