How to improve Park Brake Performance with Dr Diff Rear Wheel Disc Conversion?

I run DoctorDiff's 11.7" rear disk kit on my Duster and haven't had any issues with the parking brake holding the car on a hill in either direction, my driveway is fairly steep so it has definitely been parked on a hill.

How many miles are on the rotors and pads at this point? Is the picture of the rotor you posted the current condition or just a picture from when you first installed them?

I tested my car and found the number of "clicks" pretty hard to count accurately, can you take a picture of the lever with the park brake fully applied? Or maybe count the number of ridges visible on the park brake lever when it's fully applied?

Hmm, ok. When fully applied on my car I'm usually pulling 5 ridges clear of the upper mount.

60 miles should be more than enough for the pads to be bedded in, so that shouldn't be an issue. Is the picture of the rotor you posted earlier before the 60 miles?
Yes it would have been at about 45 and just before the track day tests. Having said that any meaningful brake bedding in work would have only been during the last 15 miles as the first 20 or so miles would have been spent on a chassis dyno!