[Gooserider]

[Political rant warning]
For those living in Europe, who aren't aware of this sort of thing... Our government here in the land of the not-so-free United States decided many years ago that we were to stupid to be allowed to make our own health care decisions and initiated a "War on (SOME) Drugs". As part of this war against readily produced, non-patentable, low profit margin substances, the decision was made that except for a few limited effectiveness drugs, it would be necessary for the average citizen to get the governments permission to care for any serious illness. This permission is given out (for a healthy fee) by government licensed people who are allowed to put "M.D." after their names. Part of this restriction includes a strict prohibition on sale or possession of hypodermic needles by anyone not having a gov't license or a permission slip from a gov't licensee. (Have to do something to encourage addicts to kill themselves of by making them re-use dirty needles)
This helps to ensure large profits for pharmeciutical companies, and helps to keep the crime rates high enough to ensure that police forces get plenty of funding and protect insurance company profits.

What this means for those wanting to duplicate lolito_fr's design in the US will need to either get the needles from an illegal source, or convince a friendly M.D. to give them permission to build computer hardware....
[/political rant]

Gooserider