To continue after a long pause…This time, it’s less detailed since these tools are a must and commonly used by anyone in the RC heli and other hobbies:

On Hand Tools:

a. Allen/Hex Wrench Driver Set – useful in variety of hex nut and bolt applications & usually comes in 1.5, 2, 2.5, 3, 4, 5, 5.5, 6mm sizes.
b. Ball Link Pliers – for easier removal and installation of pushrod ball links with swashplate upper and lower star linkages especially for those made in metal (to avoid chipping your nails!). Also comes in plastic (suitable for plastic ball linkages) and curved tip (for hard to reach places especially in helis w/ small, cramped component set-up and configuration)
c. Hobby Vise – useful in various hobby projects that need to be held steady/still, clamped or locked at an angle and assists like an extra pair of hands. Usually made of heavy cast metal and attaches to work surfaces like tables and workbenches. Makes the job a lot easier than having none.
d. Mini/Precision Screw/Nut Driver Set – useful also in variety of applications requiring miniature/small screws and nuts. Most basic sets come in #1,#0,#00,2.3mm,1.8mm, 1.4mm sizes.

Other Tools - Electric and/or Battery-operated (also necessary for Mods/Upgrades):

a. Drill Set – for boring holes and widening/refitting jobs. Also comes in variety of dimensions and applicability.
b. Heat Gun – useful for melting plastic heatshrinks (e.g. to cover exposed/soldered wires) & other plastic mods. My also be butane powered.
c. Solder Iron/Gun – ideal also for general hobby application and home use. Requires basic soldering skills and solder supplies (e.g. solder paste, wire and holder/stand).
d. Multimeter – a must for electric helis/planes and other RC electrics. Basic units measure Voltage (Volts), Current (Amps) and Resistance (Ohms). Advanced units may have more features/functionalities and cost more. Maybe analog or digital and can perform battery testing and checking.
e. Battery charger – Comes in various features and functionalities such as charging/discharging, balancing, overcharge/undercharge protection, etc. for different battery types: Ni-Cad, NiMH, Li-on, Li-Po, etc. Generally, the more intelligent and advanced features are, the more expensive. Necessary to maintain battery health and maintenance for longer battery life and better performance.

Well, these hopefully sum up the overview topic on basic, introductory tools for micro electric helis for the benefit of newbies and the unfamiliar. Have we missed any important, must-have tools for micro electric starters here? If so, pls. feel free to contribute and add your inputs/comments/ tips/ advices other than those mentioned. Thanks to all.