Does anyone have an opinion on the reduction drives offered by Air Trikes Enterprises ? The SPG 3/4 ? Sold / marketed by a Russian guy in Canada ? He seems to have been at it for a long time (supporting sales of the trikes that he has made in Russia) and unlike Raven, he does not use an HTD belt, his transmissions are more "Rotax like". It seems to be in the right power range for an engine like the Fit.