I'm not sure you need to go to MTB parts just to run fat tires, that is more a mater of how you set the spacing. On the other hand, if you want to run them, then so long as they are long enough, presumably 29ers would do, I don't see a problem. Never tried what you are proposing though.
Don't know about your pics. There is actually not that much solid info on frame building. Nobody has done a real book, which is odd, and there isn't anything one TIG. A few years back I think Neil said there were four frame books in the works. Personally the best source is the Paterek videos, but I feel that building has passed them by, there is new normal but nobody has described it. Paterek is a machinist trained frame builder. I think if you have a machinist background, you can tell where the line dividing machinist practices and frame building is likely to be. Otherwise you learn a lot of stuff which isn't how it is really done. That's why I like the videos, because even with their length they are more linear, and of course they are videos which is a better method of teaching. Actually I prefer length, but I know many don't, my concern with brevity is getting all the stuff that is reference only out of the way. I don't pretend to know the history, but I think that part of the new normal is also built on Paterek in terms of fixtures and milling machines.
We have the new lugs book, but it is written for home builders with few resources, which is one possible target. What are missing is pro level books, and amateur books that have all the pro stuff you need to do, minus the stuff that is only efficient for production. It does at time feel like the amateur want do just the opposite, use mills and MAPP, for instance.
You don't need to use fillet pro, not as a beginer, though it might be easier. For silver you can use Harris, or for brass you can use brass and water soluble flux. The latter is hard to get locally sometimes. There is a thread on Velosalon that discussed some of the new options, which are clearly prefered, but the old options work fine on the kind of tubes you will likely encounter in your early work.
Last edited by NoReg; 11-20-10 at 03:29 PM.