Oof, a wedding pew bump right in the middle of a gig. That's the Leica gods telling you to switch to autofocus. Honestly for $180 I'd just let the shop deal with it. DIY collimator work on an M3 is how you turn a $180 fix into a $500 "what did I do" story.

Fresno actually has its own local rules layered on top of SB 9, and some cities there allow more than two units if the lot split gets approved separately, so your buddy might not be as far off as you think. The two unit cap applies to the lot split itself in most cases, but a parcel that already qualifies can sometimes add an ADU on top of those two, which is where the four unit number comes from. The owner occupancy rule is also just three years for the lot split portion, not forever, and plenty of people plan around that window. So yeah, the reels are overselling it, but the law is looser than a flat "two units, period" reading too. The real problem is nobody reads the city's own ordinance, which is where all the actual limits live.