I had heard that the 47 was docile and put out a nice spray pattern. I get the point about spares etc. I don't want to get a 44. We are a Robinson free zone around here and I can't see that changing. Too many threads about blades etc. I have sprayed in the 300 but never flown the 47. The soloy might be an option- No worries about fuel types. I hear that the engine is the weak point on the 300 though and you have to be very carefull as to checking things out before purchase.