So glad to hear you're enjoying your Robin. I just installed a new Honda 35 on a BMP for testing. Angle is less important on the Honda because of the 'misting' oiling system. But, the clutch is noisier than on the R/S and the Honda's got a belt driven OHC valve arrangement. Don't know how it'll hold up. I've spoke to James at BMP and he favors the R/S over the Honda. They just run like a Swiss watch!