I've often wondered why users are not able to edit the media type flags of standard fields. It struck me that that was what they were there for in the first place.
It is the only field that has an automatic numbering system (right-click > fill track numbers from list order).
MC has an expression function called
counter() now.
It can be set to start counting from any number you specify, and can also be set to count in any increment you choose too, so, numbering 2, 4, 6, 8 or 3, 6, 9, 12 is possible.
It works with any field you like and is remarkably easy to use too.
As the [track #] field has some special internal sorting stuff going with it that makes sure in certain situations, that album tracks are listed sequentially, it is still my preferred choice for ordering files grouped using the [album] field.
-marko.