Well done Mossy,,it looks the "duck's guts"
I had a flashback when reading the reving bit,,lol,,as a hairy ass'd 14 y/o I was fiddling with a T100,) ya know the drill, pull it down to see how stuff works)
It was rear wheel less, on blocks, with no kill switch, the only way I knew to time it was to keep advancing 'till it kicked back vigorously, then retard a bit at a time, kicking to check after each adjustment,,
! kick worked too well, it started,,MAN, did it start !, carb slide stuck wide open,,the thing screamed, my head though briefly of throwing it in gear to stall it,,oops,,no chain / wheel,,and the best option didn't exist (kill switch), so the auto pilot in me grabbed the HT leads to pull 'em off, but Mr BHT had better ideas,,once I grabbed the leads, he threw me off the back of the bike,,plug leads in hand,,arms twitchin'
At least I stopped it ,,,,,,,,,,,,,,