Thank you Airportable, my heads now too big to go through the doorway! Maths and Physics  (inherited from my mother) were my best subjects at school and I enjoy solving problems. I am always surprised to see five year old higher performance cars from the likes of BMW, Audi and Mercedes fitted with cheap Chinese tyres. If only they read how badly some of these tyres perform in the tyre tests conducted by Auto Express and ADAC they would spend a bit more on quality. The same with brake pads, ADAC tested ATE, VW, Brembo, Zimmerman and a cheap unbranded pad. The test include pad, wear, disc wear and repeated braking and a simulated mountain descent. What is surprising is that the two high performance brand’s failed to match the VW own brand pads or the ATE ones but the test equally revealed just how bad these particular unbranded ones were. 
One option for the rear on a TF would be MX5 NC calipers, same piston bore, the brake cable fits into the caliper bracket and only a small modification needs to be done to the actuation lever. They are designed for 276mm discs and have the bonus of being lighter weight. 
I know that this “upgrade “ isn’t needed but the challenge is there. I have an engine-less TF, I may yet experiment. 1.png

 

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