Hey, beautiful MXZ! I've got the same frame hanging in my basement (not nearly as nice, though - original black but numerous scuffs, etc.). I'm hoping you or the others here can help me out with a couple questions, as I am building it up to ride again.
1. how does the cable routing work for the front der.? Mine is a braze-on, and looks like yours is too. What does the cable ride on under the bottom bracket, though? Mine doesn't have any sort of cable guide underneath, and no hole to bolt one on. How is yours set up under the bottom bracket?
2. what sort of posts do you have for the rear brake? Mine originally came with some weird flanged brake post that went over the holes (didn't actually go in the frame holes, but the flange rested on the frame), then the brakes went on them and a long bolt was used to go all the way through and bolt the whole thing into the frame via the threaded hole. Is yours the same? If so, can I get some of those pieces anywhere? If not, can more recent brake bosses be bolted in?
I'm hoping you can help out with these questions, I really want to get this baby up and running again. I've got a Syncros fork and stem for it, but otherwise will likely use 8 spd newer components.
One other question - does anyone know an actual or approximate weight on these frames?
Thanks for any help, please email me directly at ljklassen(at)mts(dot)net if you don't mind (replace the words in parentheses with symbols, of course).