I have been using Mike's FD blades for a while, and my scrolling has really gotten better. the last time I ordered blades, Ialso ordered drill bits (#63). They work great. But my problem is the bits are the same size as the blades. I am cutting a 3 stack of 1/4" Red Oak. Trying to get the blades to feed from the bottom of the stack is hard. I bend the blades before I can get them through the stack most times. I think I should use a size or two bigger bit. But I am not sure how the sizes run on the bits (ex. is a #71 bigger than a #63)? I need to call Mike methinks.