I installed an EdBrown wedge which I really love. It keeps the gun locked into your hand and has not adversly affected the gun's pointability in my case. The particular Ed Brown housing I got fit the Kimber w/ no difficulty.
Beware when removing the plastic mainspring housing! When I did, the tiny mainspring retaining pin busted out of the top of the housing and hence out of my personal universe--I still can't figure out where it went and the gun was out of commision for a week until I could get another pin. Amazing how important such a small part can be.
[This message has been edited by ShooterDave (edited January 21, 2000).]