c) A set of metric hex keys which include 1.5, 2 and 2.5mm. Get the best quality you
can find. $6 Also, a 1/16” SAE hex, for stripped setscrews.
Note: While you're at it, grab 1.5 and 2mm setscrews, since you will find stripped
screws pretty soon! 6-10 of each should do it. .25 each, may be hard to find.