I don't normally do 'welcome to the forum' posts, but welcome to the forum!
Flashing is the easy bit, understanding the complexity and subtleties of Motronic for a turbocharged engine is the main barrier to entry for most of us. That's mainly what's holding my interest going forward. Forum member rob.mwpropane is working towards tuning his A4 1.8T. Drop him a PM. We've been discussing a few bits and pieces and I'm sure he would appreciate somebody else to bounce ideas off.
Nefmoto is a terrific community. I had a thought the other day. Wouldn't it be amazing if, as a responsible bunch of amateur tuners and interested parties, if we could work together to produce safely optimised "Nefmoto" tunes for a variety of common VAG vehicles. Tony already has a Stage 3 tune for the S4. A good set of Stage 1, 2 and 3 tunes for 1.8T motors would be a suitable progression.
That suggestion might kick off a debate
Regards.
Doug