I have my Bias pedal box up and working, but had some real grief bleeding the brakes with the 0.625" on the front and the 0.70" on the rear. put the larger cylinder on the front and it was better. I realise this goes against the grain, but lets not forget that my brake system is hardly conventional.

So, looking at it as 2 separate systems, I have standard RST drums on the rear and FRS Brembo 4-pots on the front. Currently, I have the 0.70" cylinder supplying the front and the 0.625" on the rear.

Given the improvement of replacing the front 0.625" cylinder with a 0.70", we're thinking that the front cylinder needs to be larger. What do you think?? Is there a guide somewhere of what size cylinder is needed for each type of caliper? e.g. What cylinder would be used for AP 4-pots etc.