I just read an article on printing with unsharp mask, find it interesting and would really like to try it. But the question I would like to ask is, as far as I can see, most of what I can find were related with LF printing.

The largest format I can shoot is 6x9, and for experiment, 35mm will be much easier and cheaper. But is it practical taking into consideration issues with accurate registration and grain size on such a small negative?

It is worth doing even for 6x6 or 6x9 even?