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

Cal Tonsley said
Only about 60 miles on the discs!
With it applied as hard as i dare there’s 3 ridges past the upper mount (see photo)- this is 10 clicks in total which may be one or two more clicks than I previously tested it at! I might test it again tomorrow to see if that helps.

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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?