Along with lots of spare parts my toolbox for Z includes:

-several variations of micro screwdrivers of the slotted type for retaining screws in locos

-guitar picks size medium .70mm for easily removing plastic loco shells

-Labelle #108 sythetic oil safe for plastics and correct viscosity for Z gauge

-small camel hair brush for safely removing dust without scratching

-tweezers of all sizes for lifting out gears and adjusting whisker wires for contact with capacitor

-GPS500 foam work station tray and organizer available on Ebay from GPS_97 for $22.49 with free shipping, it keeps your loco safe during repair and keeps parts organized

-Original Windex (blue) for cleaning gears of old oil and dirt (*not recommended for any type of painted surface or electrical components)

-Marklin 89932 Roller Bearing Stand or something similar for testing running performance of locos

-magnifying goggles (all round good equipment for lots of Z related activities)