Just been stripping all the old boards out my latest project, and figuring out where to put the new ones boards.

This is the original set-up-

31102010096 by mc_mtb, on Flickr

Now in that set-up, the motor controller is next to the main controller board, however given the level of technology involved, I doubt if noise/interference was an issue.

With the new set-up, I'll be using a Smoothstepper attached to a CNC4PC C23 BOB, which takes up most of the room from the bottom right corner along to the main capacitors, and a KBIC speed controller, and Gecko G251s.
Will mounting the KBIC controller next to the BOB or geckos cause any problems?

I'm currently planning on using the existing unsheilded wire for the steppers/240V wiring, and use sheilded wiring for any signal wiring.