OK, a spanner is what you like to use but it's not law to have one; is it?
Tools don't make the mechanic, mechanics make the tools.
In 40 some odd years of being a mechanic I have emassed many multi use tools, modified as well as manufatured many of my own for specific jobs using off the shelf items such as e-clip pliers, hemostats, dental tools, none of which were designed specifically for camera repair but they all seem to work just fine. Using a bottle stopper is not a proper tool for removing a beauty ring is it?... I use a plumbers test plug.. not really intended for camera repairs but it works.
How skilled you are using them is a different story. Having a $200 spanner won't make you a better repairmen, only practice n skill can do that.
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