I am currently in a research lab for psychology where i do the "grunt" work for all their data collection, but I am also supposed to be starting work on my own thesis project very soon. I met with the instructor of the lab and at this time he has a lot of students (7) who he is supervising their thesis work, but 3 of them could be done at any time. Should I wait until he has more time, so that I can work with both in his lab or should I try to find another mentor to work with?