I don't have any detailed plans but everything I use is mobile (on caster wheels) because I want to work outside so I don't fill my garage with saw dust. Couple things to think about:
1. Large enough casters to make it easy to move and roll over concrete joints, etc. Also lockable.
2. Working height; figure out what your comfortable working height is, don't assume the plans are just right for you.
3. Power: I wish I had installed a multi-plug service outlet somewhere easily accessible on my work bench; I use an extension cord and I'm constantly plugging and unplugging tools.
4. Lighting: not often a big deal when working outside but worth considering if you want some bright lighting so it's easier to see pencil marks, etc.
5. With a miter saw, check the rotation range and access so the your fingers and hands don't get pinched
6. Wing extensions: how long do you need for the range of boards you'll be cutting, because on a mobile station you'll most likely have to make them foldable into the main station for moving and storage. If you make them large, that might become an issue.