Well guys, it ain't purdy but it's light!  Here's the carbon fiber muffler conversion I just finished for my LA46.  The stock muffler weighed in at a robust 2.75oz and I hate the mess from tongue mufflers so I did my own thing with the old stocker.
I first filed all the cooling fins off and smoothed it down and then molded two halves around it, rear part first and then the front.  I used plastic wrap as a release agent which doesn't give ya the best of smooth, but is very effective.
After the two parts, (not really halves) were done I then sawed the muffler free from the mounting tongue/flange and epoxied the two parts in place on it.  after that cured I slipped a sleeve over the tongue and around the joint between the two parts and epoxied that.  Now it's ready for the post cure process which will happen tomorrow if all goes right.
One hour at 150, an hour at 250, one at 350, and one at whatever my home made oven goes to at max temp.  My thermometer doesn't go above 400 and 450 is the proper temp at that stage.  This has worked well for my tuned pipes so should be fine here.
Final weight, you ask?  1.25 oz!  Means I can get a little of the tail weight off my Tutor.
This was a fun and quick project that nicely filled in between finish curinng, etc.
Blessings,
Will

I sawed the stock tongue off the muffler and used it for mounting.  Do you think that will be enough?  I hadn't thought about the closer proximity of the muffler verses a pipe on a header!
Could be an oops.   
Will

Wish I could run out & try it now, but at near zero temps the LA might start, but I won't!  My body's starter falls off at 50 degrees!  I'll let ya know come spring whahoppens.