My 1994 UK spec. 348 Spider is suffering from seized rear brakes, holding pressure that it won't release. Thinking it was the 26-year old hoses, I had some bespoke ones made by Goodrich, but after replacing one (so far), the problem persists. It's not the calipers (they release and open manually). When they're open, I turn on the ignition, depress the brake once...and that's it, they're locked solid and won't release again until it's done manually. There's no visible pinch in the brake lines that I can see in the engine bay (neither rubber, nor the metal hose following the chassis), and there's no sign that I've smashed the undercarriage against anything, but it's clear that the pressure is being held somewhere between the pedal and the pads. The only thing I can think to do now, is to try to locate the fault by removing the trim under the bonnet, disconnecting the Hydraulic Control Station, and hoping that it doesn't fix the issue. Because by current estimates, the HCS is about $10K, and at least if disconnecting that doesn't suddenly release the pressure, 'all' I have to do, is find the pinch between the front and the rear. Anyone have any ideas? If there's a solution to this somewhere else on here, please would someone cut and paste it so I can go and have a look? Thanks in advance.