-- actually done a few miles from moi! --> Santa Rosa, line-of-sight.
But he also had a parabolic antenna on his router.

Was pondering the Pringles free-12 dB, then saw Alex's find, with 20 dB receive-gain - which just might be enough augmentation of the prolly <100 mW of the iMac.

Knew this wouldn't be simple, but it might be fun; sure beats a lot of trenching or unsightly in-air cable run.

Thanks again.