A little follow-up...

It is done: 12" i3v w/ RUMBA and standard display. 0.40mm hex for 3mm hot-end. 1 spool ABS and 2 spools PLA.

Now the waiting begins!

Interesting aside: I broke down and sent another question to Real Colin wrt 24V. They've experimented with it somewhat in-house, and have observed faster heating times with the 12V pads compared to the 24V. Not sure wuzzup w/ that, but I figure I'd get the RUMBA on the off chance it'll be more 24V friendly somewhere down the line, and stick w/ 12V for the time being since..., well..., most everyone else is.