Design brief for this was a lightweight mid-drive that could handle some power while still holding some resemblance of a bicycle. In short the head tube angle is 69% which seems to handle Ok and the frame is 105mm wide which is still enough for lipo's or 18650 (5 cells wide fits) but bike like. Frame is designed to handle either a big block or Revolt 160 short coupled with an Adappto Max E but am still waiting for the Revolt to turn up (Israel Post is slow beyond words). Frame is constructed of 1.2mm Cro molly which is somewhat hard to source in Australia for a decent price but it is light and strong which is what I was after. In order to minimise weight I have gone with a stressed motor case which takes the majority of engine and suspension loads (can't beat circles for strength) and I have tried my best to have the frame look like a bike and not a metal box with wheels.
With the exception of a few pieces I had laser cut the entire frame was cut on my homemade plasma cutter and was made with some basic workshop tools and TIG welder. For those expert welders out there I am self taught and still learning so it may not be the prettiest but they appear strong enough.
Anyway some images
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Suzuki SP200, Mars Brushless, 300 Amp Kelly Controller,(18S12P)