Nitsujrehtona: Just tried to use it. But it isn't that trustworthy apparently. I'm testing it at the end of the second bonus. If I jump after landing before the last stars, the address shows 3's when I'm in the air and five 2's when I'm landing, ending bonus at 409.
If I'm not jumping the address will just 3's the whole way with some 4's before the coin, ending bonus at 411. That would be if the higher the number is, the slower are you going. But that isn't making sense when watching it through the level...
Nibelung: ElectroSpecter has a DKC3 guide that has "all" of the BC (At least all according to the book...) but I have found some that aren't listed there. ES went through all the coins in the game to see which ones that costs less frames to take and we have a list now with the coins that we need, hopefully that list won't be changed too much...
Here's the list of the coins and how many frames (All aren't correct, but still) you lose to take them. I'm not sure that all coins are included, but most of them.