Hallo from germany,

I think, the sgs-moduls fom Rainer Stelzer is good quality - look here

http://www.youtube.com/watch?v=iSixgC07DcA

or here

http://www.youtube.com/watch?v=3-trbJuoXaM

or here

http://www.youtube.com/watch?v=pLKhyyh4-Pk

You have a wonderful contact with him and a very good service !! He works before by the "Frauenhofer Institut" !

Best regards

Guenther [8D]