> And can an old dog (43) learn new tricks?
Howard,
You're not as old a dog as you might think. Anyway, I
started serious fixed gear riding last year at 50. My bike is
much like yours would be - i.e. a converted road frame:
http://www.classicrendezvous.com/British/Witcomb_F-Rednors.htm
Really, for road fixed gear riding that seems the best way to
go except perhaps for something like a Surley Steamroller.
From my experience, the most important consideration is to
set it up comfortably. That applies to the saddle, bars, bar
tape, stem length - everything... Remember that you can't
coast very easily and it can be difficult to stretch.
Also, don't be embarrassed to gear it a bit on the low side
at the outset. Mine is a 42 x 17 which can be a bit too high
for hills but is generally a good starting point, I think.
Also, mount a front brake. I actually use mine with some
frequency since I can't generate enough back pressure at high
cadences to stop the thing quickly.
Good luck,
Fred