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I built a cheap and nasty one, but it works well
I use the std "light shining through hole in alfoil", but made a special punch to ensure i got proper round holes each time.
Basically, i drilled a hole into a piece of wood that i can fit a high intensity white LED.
I then fit the alfoil over the front of the hole and tape it in position.
I then position my punch and make the hole ( in situ ).
The punch is basically a std hypo needle set into a piece of wood.
This acts as a guide, and is very easy to set/hold in position.
I then gently push an acupuncture needle ( 0.12mm ) through the syringe.
Perfect round hole every time, and if you do stuff it up, just load a new alfoil and redo.
Andrew
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