I just did this mod to my Uniden 68:
Mark-Rodgers.com: Uniden PC 66 and PC 68 Audio and Power Mods
I only did the output mod but didn't fool with the coils. Some of the stuff I've read said that just installing the parts gives a decent TX improvement.
I'll try it out on the trip home....
I added talkback to it earlier and figured I'd fool with it some more.
Hotel room looks like a bomb factory or something