" This phenomenon has not proved to be particularly problematic with this design, but introducing lots of unshielded flying wires to off board components runs the risk of creating more of this noise."  

How would one alleviate this risk/problem, in general?  Swap to shielded wire only (or is that a more complicated endeavor than it sounds?)  I'm researching DIY kits and this is a general question I'd love to know the answer to, since I am all about making my own enclosure, and attempting to combine/collide/experiment in general with other circuits and kits =]