Got the UCP Ultimate Clutch Pedal and BMW Performance pedal pads (and accelerator) installed!
Didn't bother with the DIY - the UCP instructions lay it out quite well. I especially liked, when the pedal is off, "look how sad the car would be with the automatic or DCT..."
Only change I would make to their directions is don't bother installing the upper / large shoulder bolt until you get that big spring in place. What a pain that was! They say you can relieve tension on it by pushing the pedal all the way back. Hmmm - maybe that's BEFORE installing a nice thick clutch stop. I could force it forward or back, but never high enough to get the .315" shoulder bolt all the way through. I wound up undoing the upper bolt, which let me pull the pedal forward past where the master cylinder allows in order to take all the pressure off the spring and install the lower bolt fairly easily. I don't intend to go back down and do this ever again, so I stuck it in the intermediate "sport" location.
Other observations: I love the shorter throw, better location, and no slop. I polished the bronze bushings with 3000-grit, 5000-grit, and Flitz on a dremel. Then cleaned, lubed up with CV-2 moly synthetic, cleaned off, and re-lubed. The new bushings don't squeak or chatter, but they actually feels a little rougher/grittier than well-lubed delrin bushings do. They seem to be pressed in and gave no indication that they're removable without special tools, so I didn't try.
It was nice that the e-clip on the pivot actually did "snap" in place like they said it would.
Mounting width of the stock clutch with stock bushings is 1.682 inches. With 2 AKG delrin bushings, it was 1.740. In this configuration I couldn't get the e-clip into its groove.
With 1 factory and 1 AKG bushing I was looking at 1.70 wide. I got the clip to stay on, but it never "clicked" into place. UCP with bronze bushings is 1.651. So there's actually a chance for a little transverse slop there, but the clip is holding tight and I don't feel the pedal move - though I could wobble it a tiny bit with my hand.
The accelerator pedal was easy enough, following instructions I had previously read.
Clutch pedal pad took a bit. Even using the alcohol trick (I used denatured) I managed to pop the SS trim off before I got the rubber pad all the way on. Had to take it off again to correct...
Brake pedal was a cinch. More alcohol. I first tried to slip on the lower, narrower portion and tweak the rest in to place - no-go. Then I put the upper, thicker part on, and just held the tip of the pad with my fingers as I brought it down to the lower part of the pedal. Wasn't to bad wriggling that in to place.
I love my new pedals!