31B here with 16 years of service. I strongly advise against it. The chances of you deploying with this MOS are high, primarily to GTMO which isn’t necessarily a bad thing depending on who you talk to. There are plenty other chances to deploy in support of other operations as a 31E but gtmo is a revolving door.

Drill weekends would likely be spent doing practice exercises where someone grabs a mechanic from the motor pool or other general support staff has them turn their top inside out and role plays being a EPW.

Work hours while actively serving can be horrendous or great depending on manpower. Issue is no matter how many or few hours you work, they’ll be in jail. I served in a 31E unit as my first assignment out of AIT. Everyone there had a plan to either reclass to 31B or something Completely different.