If the caliper is still sticking, what exactly did the brake company do? Whole caliper refurbishment or just seal replacement? If it's a floating caliper what's the condition of the pins (surface pitting?) and dust seals (split, brittle with age)

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1980 MK2 Ford Escort RS2000
1979 MK2 Ford Escort RS1800 GRP4 spec historic rally car.
1998 GC8 WRX Tarmac rally car