The Transformer's Action Masters toy-line arrived at the tail end of the original Transformers run from the 80s. I suspect they were more well known in Europe than in the States as the series ran a year longer in that market. It's fairly easy to come across an incomplete Starscream Turbo Jet. I liked the design. It reminded me of the Micronauts' Photon Sled. I wanted the modifications to be simple.
The whole story is here.