I've recently purchased a second hydrometer and was thinking today as a tested my latest batches, does it make a difference if the sample is of clear wort or if there is some trub/cloudiness in it?
I imagine I could test this with a 'very cloudy' Vs 'reasonably clear' set of samples, but my samples would be hard to fix values to.

Hey Muggy,

Short answer is I think you're okay. If you have trub at the bottom you would want to have enough / excess wort in the container so the hydrometer isn't sitting at the top of the trub layer, as that would mess up your numbers.

If anyone else has different or additional info please feel free to chime in.