Look forward to seeing more pics.
Yeah, maybe 3 is best depending on your bed/frame twist. My goal was to minimize overall variance across the bed, and not just optimize for min variance at just the 3 probed points. For my plate’s twist (and/or the surrounding gantry/frame…), trying 4 points with looser tolerance seemed to help me end up with less variance across the entire bed, than if I did 3 point Z-Tilt. I tried both 3 and 4, but stuck with 4, using bed spring adjusters helped reduce Z–Tilt attempts too. Spent bunch of time micro-adjusting rails, gantry and frame trying to chase down twist cause(s). Based on advice from others (Jeff?) I waited for the bed to heat up for 5mins before probing, printer’s in conditioned 67F space.