The audio and video difference comes from the fact that I ripped the castle videos from DVD.
I can't think of much to say here, except that since I recommend using the second M-Tank during the Magma Man fight anyway, Tornado Blow is indeed recommended during the last stretch of this level. Just watch your jumps.
The one round Twin Devil kill isn't difficult at all the way I do it. Just do the first four bombs as normal (pausing when they connect), but hold jump as you leave the subscreen for the fourth time to automatically jump so you can place the fifth bomb. Try it in Time Attack a few times, it's not nearly as hard as the old pausing in midair after placing the fourth bomb method.
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