Hi Graham, sorry about that, i thought others would likely be more suited to answer, but obviously we all thought that  I don't think a 4 or 5 magnet rotor makes any difference, so no, i did not try that. I don't know what you mean by "a gentle variable DC drive to the centre Gizmo?"The Gizmo, i think, is just a coil around a core being pulsed at the right time (by hall sensor, pickup coil etc.) which gives it its constant speed IMO. Looking at Tinman his YouTube side ( https://www.youtube.com/@69Atho/videos), he is still now and then showing some updates on his build, but apparently not interesting enough for updating this (his) thread(s). Good to hear things are improving (read and write again), so keep on tinkering  Itsu
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