I use these stands for music, laptops,mixers or whatever. It is fully adjustable and stable as long as you remember to tighten the platform when you lay it flat.
http://www.amazon.com/Stage-SM7211-Professional-Folding-Orchestral/dp/B0002F7IN0

Bernie
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact