If you do/will make public appearances, I cannot stress it enough...
Carry an Imperial Emergency Field Repair Kit - Pack a toolbox! Bare essentials will vary, determined by construction techniques. Cyanoacrylate glue (CA) is indispensable - it can have you back in action within minutes.
Other obvious tools - Screwdrivers (slotted and Phillips); several pliers/grips/cutters; epoxy, Velcro, utility knife; white tape; electrical wire/tape; etc.
Even performing Periodic Maintenance cannot prevent certain Armor Emergencies... be prepared, Trooper!