I built a stand for my (new to me) drill press! Everything is nice and square, and I'm really proud of the result. And then I put it on my not so flat garage floor... And the locking casters aren't all that effective anymore. It's also pretty wobbly. Any tips for placing movable tool stations on wonky floors? Smoothing the floor sounds like too much work!
Assuming it currently uses four caster wheels - perhaps consider changing it to use three, arranged in a triangle. A three legged stool will sit ok on an uneven floor, but a four legged stool won't.
I guess this would make it all much more likely to fall over though if say the drill was pushed to the side. Hmmm.