I found the same thing with a CFII disc.
My cure was to install a factory from the dealer 340 disc, and I spaced the CF away from the flywheel the thickness of a hard washer, guessing .040 or a bit more.. It also makes taking off, a dump it and go deal with a 10.97 starter gear. If I need more clamp I just rev it up a lil higher.
The penalty is that the 340 discs don't last all that long, and if I be mean to them, they flat out give up; usually spitting out the springs and or cracking out the centerhub. No biggie, on a 4-post drive-on hoist,my record is 17 minutes to drop the unit, which includes dropping the GVod and dual exhaust. Most of that is disconnecting and removing the shifter.
I got a Passon box and side-cover, making the A833 about 85 pounds; making it a slam-dunk to install.