Mxsmanic wrote:
You can find the answer in FAR 91.121(a)(iii).

Found it, thanks. I'm surprised that just setting it at the airport
would suffice--one could conceivably fly for hundreds of miles VFR,
and the altimeter could change significantly along the way.

That Reg does not apply to flight within 3,000 above the surface.
You have to look at two other Regs to conclude that.
Therefore, under 3,000, an adjustable altimeter is not required
per 91.205. FARs don't apply to you; stay away.

F--