I have a second hand surface still running windows that I draw on. With a paper like screen protector I find it quite pleasant. Mines a 6 I think, runs Krita great I imagine it’d be even better if I ditched windows bloat.

My hands are average so I haven’t had an issue. I bought used and it came with a thumb grip. Also I keep a leather shell case on it, feeds into the retro look and adds some bulk. At no point have I found it uncomfortable and no one else who has picked it up has complained given what I’ve added to it.

You can buy cheap dumb adapters that are just metal rings and transmit no data or more expensive adapters which transmit data and allow autofocus. Buy cheap adapters for any old lenses you want to use and expensive ones when you value the lense tech.

I’ve got a D750 and an XT100. Given the smaller size and the cheaper old lenses I can run the XT has gotten more use in the past few years.

Not op, I’m not seeing anything about calibration for PM or VOC just stuff for open air bump tests. Interesting alternatives to filter load and PIDs I wonder if they’re robust enough to find their way into EPA or OSHA level investigations, I haven’t run across them yet