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I would rather read an explanation standing on my head than get that wise arse "use the search function". You and Zed Head are the ones who take the time to explain, it's that "teach a man to fish" thing.

The pull to the left and excessive wear on the left side pads suggests you have a sticking caliper. Are both left side pads equally worn or is one more worn than the other? One side worn is probably a piston not returning, both sides worn might indicate an upstream problem keeping pressure on the entire caliper. Apply Occam's Razor here - caliper rebuild kits are cheap and its an easy project. It will give you a chance to inspect the bores and pistons for corrosion, pitting, ...etc. Do both sides if you elect this option.

As noted, the FPR on Jai's car has the two inlets. Here are the photos I took yesterday.

I've met these guys and seen this Z, and I must say it is a beauty.