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Of course you can not do without drills. Sizes of 0,5 - 0,7 - 1,0 - 1,2 - 1,5 -2,0 - 2,5 -3,0 mm should be part of your toolbox. See to it that you have 0,5 mm in stock in sufficient numbers. These drills are very fragile so they usually don't last very long, especially when you're a novice.

Drilling in metal needs a Dremel or alike and preferably a drill stand. Plastic however can be drilled by hand. Should be drilled by hand actually, because the speed of a Proxxon/Dremel is far too high. It will overheat the plastic and it will melt. Most drilling in plastic is for pipes and tubes. These are mostly made of 0,5 mm brass wire. So I drill a lot of 0,5 mm holes. To handle 0,5 mm drills by hand I use wire insulation and sometimes a pencil:

Of course more sophisticated tools are readily available, but so far these methods sufficed