The amount of pressure generated by the presses the blending houses have is incredibly more than what you can obtain at home. Whatever techniques you use will be insufficient to produce the heat that is obtained by commercial presses. They only keep tobacco in the presses for a few weeks, but their accelerated fermentation does produce the marrying that they claim, I think, and that seems to have something to do with selling it and making money lol.
I used to obsess about not cutting flake whatsoever, but now I pull apart 3-4" pieces and store vertically in whatever size jars I'm using. I used jelly jars for all my open blends and pints for storage. In this way I maximize storage, leaving enough intact flake to play around with when packing.