Faster Steering for xDrive

[tetsuo111]

Non-M E91 guy here. The car is dual-use as DD and track car. Really. Checking in here seeking first-hand user experience.

E9x steering ratios:

xDrive - 18:1
non-M RWD - 16:1
M3 ratio - 12.5:1

I find myself at the limits of crossing my arms on the steering wheel on slow, tight turns (Pacific Raceway 3A and 3B and the Ridge corkscrew and thumb). Short of redesigning the front suspension Ackerman point (don't want to go that deep), I believe my options are:

1) M3 rack, or
2) steering quickener as used on some track and rally cars

Sadly the M3 and non-M racks are not PNP jobs. The racks attach to different parts of the front subframe. I suppose anything is possible by welding new tabs on both the subframe and M3 rack to fit, but this borderlines on heroic effort.

Steering quickeners have been around for awhile, and come in standard 2:1 and 1.5:1 gear ratios. A 1.5:1 quickener ought to result in 12:1 steering ratio. This would be a fine compromise for dual use street and track. Proper install seems somewhat invasive, but again anything is possible with $$ and commitment, right?.

Anyone reading with direct, first-hand experience? Any safety or reliability issues? Will the column still collapse as designed? Does the quickener introduce slop into the system?

Thanks.