I do maintenance at a telescope and occasionally fill in as telescope operator. It doesn't pay great but the work has been fulfilling. A telescope operator recently quit and they implemented a temp salary (removing my overtime) without discussing the numbers first and ended up putting me at the bottom of a lower pay scale. I thought I was stuck but eventually complained and got reverted back to hourly, but they screwed me out of 200+ hours of overtime because "I didn't complain soon enough and therefore that is the same as me accepting that salary". I'm going to quit soon because I don't work for free.