That is absolutely correct Jim. Having a dedicated operation who deals in seals and Orings almost exclusively, in my back yard, is a plus. One can determine the sizes no problem, but I did have to dig a bit deeper to find the substance it is made from. As for silicone coolant hoses mentioned. I just ordered a second replacement hose as Ive burnt two on the exhaust now. This time I ordered a very expensive Silicone one. One that has the appropriate bends. Ive fixed the routing issue by shortening up some of the other hoses going to the cabin heat radiator. I began replacing my coolant hoses with NAPA supplied hose. I have abandoned that effort for any of those that came with the engine itself. Silicone hose that is straight dose not lend itself to bending into much of a radius. It likes to collapse. So, LEAF is my source for Rotax Silicone formed hose and while I was at it I paid for the Rotax Orings for my new oil leak at the crankshaft position sensors.