It is possible to read switches with the Maestro and have it stop the servo, but doing so would require scripting on the Maestro which might not be trivial if you are not familiar with it (or similar programming languages like Forth). I recommend taking a look at some examples of the Maestro scripting to see if that is something you are comfortable doing. You can find some examples in the “Example Scripts” section in the of the Maestro user’s guide. Also, this thread about the Maestro and end switches on the forum helpful.
Grant