RE Starter: The Bosch one was in good condition, brushes still got life and bearings with very little wear. The commutator was still level and unscored, but was no longer copper coloured, even on the wearing surfaces. It took a little cleaning, but more than a quick swipe or two i've found on cars. The unit is cleaned, greased and marked 'good' for future use. The Arrowhead one was short of grease, but otherwise looked well-put together and hopefully won't (by design, it should not) consume the massive current the Bosch did when it gets down to 0C and below here again. I have Motobatt and all new power wiring.
I may look at the coil feed wire as it does meander around the bike. I'll fit a proper distribution box when I do that as I already have auxiliary supply for fairing lights.
RE:Wedgetail. I expressed an interest via the website some time ago with no human reply. The facebook page also seems to be cold. Hopefully it's just a Covid glitch and there is still a plan to make these to buy. I hope they have not got snagged by some Directive or regulation that needs 100 items to be proof tested / EMC / colour of box compliance. Or worse, lack of interest. In the RC field, auto-advance ignitions are cheap and plentiful. 28 degrees is a common advance value for 10cc - 50cc engines..... The RPMs are very similar to our much bigger engines. 7,500RPM being a typical 'redline'. We run them at that on the ground with the prop chosen for that sort of RPM. They may speed up or load a bit when moving in the air, but not greatly. tickover is usually a bit higher at 1,500 to 2,000 RPM depending on skill at tuning/prop weight/tuned pipe.