Your belt looks pretty seamless to me! Nice work!
Really surprised that they wouldn’t send you the drill start adapter; I mean, at least 1 (or probably at least 2) existed… we saw the pic! Haha
Just listen for any pinging when running fast or under load. If it sounds funny or seems to run overly hot, advance the timing a little. The breaker cam is on the camshaft, not the crank. That means ten degrees deflection of the timing lever is actually five degrees of timing advance or retard. If you’re pointed left visibly, say ten degrees, that’s maybe five degrees before TDC
That’s incorrect. Brain misfired. The camshaft, including our breaker cam, turns half of crankshaft speed. So for each degree of crankshaft or piston movement, the cam moves half a degree. If your lever is pointed say five degrees left, that’s ten degrees of advance compared to straight up. In other words, what looks like a little is a lot.