I've run just about everything there is on my Up and Afinia. The Zortrax is on an ABS-only diet for the moment, and so far the gMax has only run Colorfabb PLA+PHA. I'll probably try it with Ninjaflex soon - the 0.5mm nozzle and controllable speed will be good for it, but it remains to be seen how the feeder will do; slippage is a problem with the Up and rubber. Also looking forward to trying nylon on the gMax. I have a bunch of XT but support removal has been difficult on things I've printed with it. I couldn't get T-Glase to feed on the Up but it probably will on the gMax. And I've got a spool of Woodfill... so many things to try!
We found the woodfill to work perfectly with the existing slic3r profile. It's so much fun to print with and it smells great. We've found our drive gears grip the filament amazingly well after experimenting with many setups (including the QU-BD) and our new design works great with eco-flex PLA from formfutura. For very flexible filaments its eccomended to reduce the speed. We plan on increasing the extruder motor bracket barrel even more to ensure any flexible filaments dont bind up.
I cant wait to try the XT filament and T-Glase hopefulyl tomorrow. The question is what models to use?