I searched and couldnt find this exact answer. I'm about to order new pads for the c melody I'm currently fixing up and had a question. I used my digital caliper and measured every cup. I measured a lot of cups that were like 26.9mm or 19.2, or 24.7. Do I go with the closest below or above that number. So for like 19.2 mm do I order 19mm pad or a 19.5mm pad?