Excellent find - thanks for sharing.
I just used it to import the new Sprint ROM .nbh, made a few tweaks, cooked and flashed. Worked well.
The build process seemed fast to me, so I just timed a build with this kitchen and several with 3 different EVKs. Right at 1:00 for this, and EVK varied from :35 to 1:40 depending on whose variant of the kitchen I used. So, yes almost twice as long in one case - but only 30 seconds
