Just a quick follow-up...I mounted one set of the Vesrah VB-128 shoes from Dennis Kirk on the rear of my daily-driver CL450 yesterday...no problem fitting them on...the pivot holes in the aluminum were quite, ah, shall we say, "ample"...
I was somewhat annoyed, as the OEM Honda shoes fit nice and snug on the pivots...not tight, but there was no play in them...
A half-hour test ride didn't really show up any great increase in stopping power...but as Bryanj pointed out, they need "bedding in"...
(there is actually a technique for this that I've used on my Corvette, but I doubt Honda ever did anything like that to their Customer Serviced bikes)... 
Doing the twin-leading front shoes today...I hope...
Update: I got the Vesrah VB-117 dual-leading shoes installed today. Nothing unusual; except the pivot holes were as sloppy as the rears. The adjustment rod gave me some frustration; with two shoe springs, the outer helper spring, and the cable spring all pulling on the actuating cams, it was impossible to "feel" the rear shoe touching the drum. So, I milled the heads off the peened-on clevis pins, made up a pair of new 6mm SS clevis pins drilled for Cotter pins, and then installed the brake assembly, hub/wheel, speedo drive, and axle and "bench synchronized" the shoes by holding the front actuator/shoe against the drum; pushed the rear actuator/shoe against the drum also, and adjusted the rod so that the two new pins just slid right in...
Worked great! Took it out for a spin; better braking than the old shoes, but until they "bed in", I won't see any dramatic difference in stopping.
The OEM adjusting rod was disappointing; I expected better engineering from Honda. No flat on it; no hex; no knurling...nothing to get a grip on to turn it...
