I bought two 10" square pcs from Crutchfield (Electronics), cut a pc about 5" by 3 or 4", peeled off the backing, and wrapped the lower 2/3 (approx) of the shaft by eyeballing the placement of the boot such that it would still cover it. I put a second piece on over the first piece and positioned the seams 180 degrees out of phase, squeezed it together with my hands to make sure the adhesive would stick, and reassembled the boot, etc. Others here on this forum did a similar install, but I have no idea if they installed the dynamat as I did.
What I don't know is, did it make a difference in sound levels versus without dynamat? I get very little noise and then only when I'm flexing the shifter to one side or forward or back against the grip of the meshing gears when power is being applied or during deceleration.
Geez, sharky, I know you haven't been pleased with your B&M unit, and that's too bad ... I really like mine. If you wanted to sell it here, you probably could with little problem and then get a UUC shifter. I can't speak to their differences (if any) since I have no experience with the latter. All I can say is "good luck".:hmm: