Thank you guys, there's a lot of good information here. I didn't realise the timing was that tight on the ][. I guess Woz did the wrong thing, or just the right thing, by making it just barely work, yet work very reliably at the same time.
The //c and ][+ may be significantly different. For some reason I always disliked the //c, so I don't own one. I do have a ][e which I can play around with for comparison. Sadly, that ][e did have a R65C02 in it, (Rockwell), but I sold it to someone who wanted an Enhanced //e, because I wanted to return that machine to it's original non-Enhanced state. Else, I'd have more things to try.
I may have an additional R65C02 around somewhere, I'll have to look.