I agree w this 100%. It will be full politics whether or not you get back if the staffing is 100% . If the ATM has reason to like you then they will politic you back in a HEARTBEAT. especially since you would presumably easily check back out and stay awhile. If not yer SOL.
To deny you will be easy they will just say "Sorry we are at 100% staffing", yet if they want you they will pull all strings to make it happen. Same as if say you bid an FLM job there . The ATM can easily say "sorry buddy i'd love to pick you up but we are _____% staffed, and they won't give us a deviation." If he actually wanted you he could have you and would! They make exceptions all the time when its convenient. Deviations whenever they want them. The rules are just a loose guideline for the peasants to follow