I took a 930 Trek 920 which I bought for the OX Platinum frame. I used a set of used Tiagra 9 speed shifters, Richie Bio-Max bar, a short stem , a 1 1/8 threaded stem to thread less adapter, a deore rear derailleur, a Tiagra cassette (11-28 ) and an old sugio AT crank. Most of this was in the spare parts bin, I did have to buy the rear cassette and inline cable adjusters as well as figure out what bottom bracket to use with the crankset. I could not get the stock FD to work with the 48-38-28 crankset, but a Tiagra FD was cheap. A clamp on cable stop and drilled the bottom of the BB to take a cable guide. very fun project! I built it to be a funky weather bike w/fenders, I found that recumbant fenders fit better on the 26" rims. It rides great, certainly not as fast as my road bike, but hell for stout and very solid. I'm quite happy with the result, if I had to buy all new parts maybe not, but for a foul weather, nasty roads, or Katy trail bike it's the bee's knees.
dave s in KC