I wish I could get my hands on a good pill press, but the FDA is a party pooper.
As for caps, I don't trust even my jewelry scale to measure a few mgs. I looked into a scale for doing this, but it was a rabbit hole with no definite answers as far as i could find. So many opinions, no hard facts, and not much consensus makes me not trust the discussions. I need to make friends with a chemist that has lab experience.
I've tried doing small dose caps with my "jewelry scale" that supposedly has a very low variation, then pouring out the contents to compare, and some are visually different amounts...so they probably vary quite a bit.