Had you looked at the newer Moment DW (double wall)? It's supposed to be more storm-worthy, and would solve the condensation issues you had with yours.

Isn't Nevada City close enough that you could drop in on Henry Shires for a visit? I seem to remember it's being "just up the hill," but the last time I was there was the fall of 1963, so my memories of course have faded! That way you could look over all of Henry's models.

I suspect you may want to wait a year for field evaluations of the Protrail, since it has just become available.