I had a reply from Bob Johnson of Alroh, attaching their file on the Imp. The file has a photo, a parts diagram, and a parts list. He said they have no stock parts, but might have a couple of second-hand bits in a cupboard somewhere. (The Outdoorking store lists the blades and says they are available.) It was interesting to compare the Imp in the photo with mine - theirs has 6 wheels instead of 4, a completely different handle, 3 retaining clips on the cutter cover instead of 4, a large spring to counterbalance the height control, 2 'wire brushes' for some unknown purpose, and a couple of detail differences in the engine (different muffler and stop control). I don't know if their Imp is later or earlier than mine. First guess would be they took the photo of a prototype then decided to cut the cost of production.
