OK - sorry about that Jason - just read through the whole thread and now see the details.
You mentioned the Wilwood mechanical caliper for E-brake. Not sure if you've gotten these yet? I'm in a similar boat and do have a set of these - that I'm likely not going to use. I'm not crazy at all about the way they mount - basically a small "tang" fitting into a somewhat crude slot on either side of the caliper (as shown in that previous pic). I'm also not crazy about the way the floating pad sits in the caliper - it's not attached to anything! There is an actuator pin, backing plate and puck-pad all sitting loose in the caliper - only thing holding them in place is the fit of caliper to rotor, and that's "roughly" determined by that tang mounting business. Might be all right for a go-cart but......
You've probably seen the new Wilwood caliper with built-in e-brake? That might be the direction you'd want to take?? Or..........
How about a real floating mechanical caliper - with bolt-in sliding pins that simply bolt to your mounting bracket - just like the hydraulic Wilwood calipers bolt on??!!
Take a gander at these - same overall size as the Wilwood mechanicals, true precision floating mounting pins....
http://www.ipsco.org/Custom%20Servic...ng%20Brake.htm
Came across these on a GT40's web board - and they look like the perfect match for a set of Wilwoods!
They Will be going on my brake set-up.
Cheers,
Jeff