Here are the exact details I got from Rick Fox:
Hey there Buzz....the pattern is really easy once you get past the epoxy on the bodies. The recipe is as follows:
Hook: TMC or Targus 2457 or even the 2487 (I like the light wire on the 2487) copper or gold bead.
Body: Epoxied medium sized ultra chenille. I use olive and worm brown (the golden brown is nice too). Try some other colors and let me know how they look. For the beaded Radical caddis. I use the small beads from Spirit River in brown and in emerald...those look nice to my eye.....use some other colors also. What I do is cut a length of 0.012-0.015 mono. I burn one end and slip 6 beads (3 beads a body for a size 16 hook) onto this strand of mono and then I burn the other end.....cut the length long enough so you can slip it in one of the slots cut in a Styrofoam cup for the epoxy work.
I've had much e-mail on how to do the Radical Caddis bodies. Whether you construct the bodies out of glass beads or the fine diameter chenille (medium ultra-chenille), the process of adding the 5 minute epoxy is the same. With razor blade in hand, and a Styrofoam cup; I cut slots along the top edge. 10-12 slots in which I can insert a length of chenille or strung beads that will make TWO bodies. So obviously in filling all the 10-12 slots......you can epoxy up 20-24 bodies at a single time. Mix up the five minute epoxy on some paper and use a wooden toothpick. Unlike doing epoxy on the windings of a fly rod......the more bubbles you can incorporate into the epoxy mixture.......the better. If you want to get wild, sprinkle a tiny bit of pearl glitter into the mix.......and just start dribbling the epoxy on the beads or the tapered ends of the chenille (which you taper with a match). Rotate the cup for 5 minutes to get a nice, evenly distributed epoxy body.
Over body: Olive Z-lon (for all the Radical caddis colors)
Topping: 2 strands of pearl Flashabou. then 2 stands of wood duck tied long
Legs: Brown Hen Hackle (for all the Radical caddis colors)
Collar: Really doesn't matter what you use for this simple collar, I just grab whatever that has the same color tones of the body. The Spirit River Pseudoseal works good, it adds some flash to the fly.
Head: For the Green toned Radical Caddis I use peacock. For The brown toned Radical Caddis I use natural ostrich.
Tying Instructions: I do a bunch of bodies beforehand -- secure the body by the mono or un-epoxied chenille to the top of the hook. Obviously leave a bit of un-epoxied area length so you can tie the body down. Then tie in some z-lon, cut slightly shorter than the extended body. Top with 2 strand of Flashabou and the wood duck antennae.
Dub one turn of the collar. Tie in hen hackle on each side, extending to about the hook bend (this single turn of dubbing helps flair the legs outward) then finish off the collar with 1-2 more turns. Finish off the head space with the ostrich or the peacock.
Rick Fox