Engine behind seatpost?
my latest idea for the bike i never actually finish is a slightly stretched frame with the engine sitting on the extended chain stays. lower center-of-gravity, less obvious engine, shorter drive chain, and easier clearance for peddling are the advantages i'm imagining. sort of a cargo stretch with an engine is what i'm picturing.
has anyone done this yet? any reasons why it's a bad idea? feedback please (even Walter's).