BostonFixed asked:

"Ken- are you scrapping the steamroller icebike project?"

Yes, sorta.

After all that research and finding out it would work, the family asked me to postpone it for a year.
For the really nasty days I have a very competent geared ice bike from last year, with all the lights, fenders and studded tires.
I test rode it the other day and it feels creepy after riding fixed.
Like, slimy?
Vague?
Anyway, if I have to ride a geared bike for ten or twelve days next winter, I'll do it and feel thankful for it.

But, this time next spring...

Many more options presented in this thread than I would have expected.
This seems very doable.

I could do the frame around income tax time (I file electronically on Feb 2nd) and then the components a little later.