Can Plat x-overs be modified to bi-amp?

Well, I'm finally getting close to rebuilding my x-overs. I've got a pile of sonicaps waiting to go in and plan on getting some Mills resistors to replace the old sand resistors. I'd also like to replace the coils if someone knows a source. When I do, I'd also like to replace the terminals and set it up for bi-amping. Is this possible? I'll probably have to build a new box to mount on the base as the Sonicaps are friggin huge and I doubt they will fit inside the back cover.

yes, easy like.

Skip, you're going to have a problem using Mills resistors as they max out at 12 watts and most of the stock resistors are 25 watt, IIRC. There is one type of Mills resistor with a heatsink that is rated at 50 watts, but it's not really audio grade.

What type of resistors should I look for? Will the stock ones in the x-over work fine or can improvement be had by swapping them out? How about the induction coils? I know Rolland offers new coils in his rebuilds. Any idea where to find new ones?