Can anyone please help me?? Its now time to refurb the front brake on my spitfire 1500, and as everything else has been upgraded I was looking at changing the calipers for GT6 items, My spitfire is supposed to have type 14 calipers....right or wrong? GT6 should have type 16 calipers? I bought a knackered old gt6 caliper off ebay to compare and it seems to me exactly the same as the ones already fitted. What is different between them? Is there any markings or numbers marked on them that identify them? The supposed gt caliper has 6HJ stamped on it and the ones on mine say 17H6 on it. Do these mean anything to anybody? Is the conversion worth the upgrade?