It seems like the 3100 is their main focus, with it seemingly being the same instrument but with a tighter wrap. Both the 3100 and 6400 is available in RZ (rotary front action), FA (piston front action) and TA (compensated top action).
Last December I got to play a 3100-TA4-O, that would be the top action with the good layout of the 3rd slide, and I liked it a lot. Picture attached.
Does anyone have pictures of the 6400 in any of the configurations? Would love to see more of it.
