Brakes Squealing
I dont know if this helps but I remembered reading the following from the EBC website recently, found it and cut and pasted it below, it mentions you might need fibre shims added? I dont know if you did originally.
"NOISE - Light whistling/squeaking (at walking pace)
This noise usually happens as the vehicle is coming to rest and is again typical of a pad that is just bedding in or has been under used. Again the remedy is to allow a few hundred miles for the pads to properly seat and have 100% contact surface against the disc. If the problem occurs intermittently, one good cure is to use the brake severely every day now and again on a safe secluded low traffic piece of road to “de-glaze” the surface of the brake pad. Obviously extreme caution must be used when recommending this to customers, especially with regard to the low traffic aspect. If the problem occurs continuously and the pad was not fitted with shims on the rear of the steel backing plate, call EBC for a free set of anti-squeal shims, which can be fitted by your local dealer. As this type of incident is usually vehicle specific EBC do not normally undertake to absorb the fitting charges for applying the shims but will issue the shims themselves free of charge.
SCREECHING (a loud squealing noise when applying the brakes at all times)
The usual reason for this is that the pads have not bedded in. If this has happened during the early life of fitment tell the customer to wait 300 - 500 miles until the pads are fully bedded in. This noise is also very prevalent when the pads have been fitted to rotors that have not been turned and have grooves or scoring. This will also extend the bed in time.
This is caused sometimes by the pad bouncing around in the caliper and can be cured by the application of fibre shims. Call EBC for the issue of free shims, the installation of which must be paid for by your installing mechanic, which should solve the problem."
