That looks great! I actually done the E46 SMG shifter a few years ago on my first 4.6is, I also adapted the shift pattern so it worked in conjunction with the actual shift of the car. I was thinking of going with the the M5 one this time round and doing the same as you, but I'm also planing on adapting the shift pattern on the M5 one also.
Not a geat pic but I'll see if I have another, you can see the shift pattern on the knob is the same as that on the base of the gear surround.
