Starting a job at a violin rental/repair shop next month. What are some things I should be familiar with?

Just landed a job as setup/instrument refurbishment at a local violin rental store. Anything weird I should know before starting? They're willing to train and everything. I'm pretty familiar with these instruments because I used to play in the school orchestra.

I've always worked on my own gear whether it's instrument or amp related. I'm mechanically inclined and can do a decent setup/string change fairly fast. I've repaired nuts/necks and have sanded and refinished a few acoustics. I've never sat down to work on a classical instrument. Is there anything specific I should know before I even set foot in the building?