Diy it?

[amoose136]

So I think I'm going to try and build one of these the Lego/Arduino route as a first attempt and then maybe upgrade to a dedicated solution later. What kinds of coils will do as substitutes? Are the official coils custom wound? If so, what gauge and how many turns? Additionally would something like this do for the laser diode. I assume any old 365-405nm laser diode should work provided it's at least 100mW. Lastly is there anything special about the mirrors? Are they a COTS part or if not, will a small fragment of a well cleaned standard bathroom mirror do?