TrackIR LED holder

NOTICE: It is not allowed to print and sell this design on eBay (or anywhere else). It does not matter if you change the design. Please read licence information.
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I needed a better LED holder so I made my own. To clarify this design works for TrackIR as well as OpenTrack etc software.

As always, if you find it useful a tiny donation goes a long way to show appreciation. :)

Parts needed:
3pcs IR LEDs
1pcs resitor (or if you can't match the exact value combine two in parallel)
1pcs PTC fuse of at least 3xIf (for me 300mA).
4pcs thin wires (I used 26 AWG) I call these cables 1-4 in the description.
1pcs thin steel wire ~20cm
1pcs DC-power source with cable (or USB cable)
1pcs velcro strip

Using the LED Series array wizard (http://led.linear1.org/led.wiz) I find that for three LEDs (Vf=1.2-1.4 If=100mA) in series powered by 5 VDC results in me needing a resi