Thought I'd indulge in some gratuitous showing off, apologies.
After being delayed about 6 weeks my Vaya frame arrived from Taiwan (via Edinburgh Bike Coop) and I put all the bits that had been on my Roadrat. I've not weighed it. It's not light, but not too bad considering what it's designed for - XT hubs (front has a dynamo), A319/719 rims and 32mm tyres.
The messy wires under the top tube are for a very bright front and rear dyno-powered LED set, with the gubbins in a box under the saddle.
I'm wondering if it's too cold for a few days touring somewhere. Not sure if I can wait till spring!