The Radial rack should help out a lot of people, and is very different from any line mixers out there as that isn't quite what it is anyway.

Usually they post a user manual at their site fairly early, showing suggestions for routings and use cases. It wouldn't surprise me if this unit has some practical applications in the studio as well as live.

Eugenio Upright, 60th P-Bass, Geddy Lee J-Bass, Hofner HCT-500/7, Yamaha BBP35, Viking Bari
Select Strat, Select Tele, Am Pro JM, LP 57 Gold, G5422DC-12, T486, ES295, PM2, EXL1
XK1c, Voyager, Prophet XL