A phone call to Dan at CorbiAir resolved the first two problems. The pump is designed to REPLACE an existing pump which would have a 950 226 or 950 227 spacer/gasket in place. This would hold the pump off that edge. And if there were a pump in place, there would be two studs on the gearbox for the pump to go over and nuts with lock washers would hold it down. So, I ordered the parts and they have arrived. The issue with the 3/8' & 1/4" hose remains to be resolved as finding a suitable banjo with 1/4" hose barb has been difficult. I have a 6mm banjo on order and will have to see if that will work to connect to the Rotax pressure regulator. Further work awaits completion and testing of the new brake setup.