Members with 4 wheel disc systems: Can you lock your wheels?

Source? I want some lightweight rotors!!

Increasing the bias should help. Right now you've got more of the rears helping slow you down. Yuck.

I would think that you could dial this in and be able to stop just fine on a strictly manual system.
The Dr Diff 13" kit comes with an aluminum hub. The calipers are aluminum and the bracket to attach the calipers are steel but they are far simpler than the heavy cast iron caliper adapter. I weighed everything that I changed while I had the car apart. The Borgeson steering box saved 12, the return from Fast Ratio steering arms to stock shed 2 lbs.
Regarding the bias....
The goal was 2 to 1. Prior to the changes, I was really front heavy to the tune of around 3.3 to 1.
Driving to and from the car club meeting tonight, it performed fine. I didn't stand on the pedal but it never gave me the feeling that it was unsafe.