I just got this leg bag emptier http://www.jb-3.com/jb-3.htm and it works great. Doesn't require any power so you don't need to do any wiring to your chair. It's also cheaper than the electric ones.
Dave
Dave
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Dave
C5/C6 complete
http://www.davegrotzinger.com
http://www.daves-webdesign.com
"I knew all the rules but the rules did not know me guaranteed..." - Eddie Vedder