I have been working on trying to establish the measurements for the controls on the arms of the chair.
There are some measurements out there, and I'm getting help adjusting this diagram to be as accurate as possible.  There may be some changes later, if so i'll post it.  We are very fortunate to have people like Mike Paugh and others that offer free advice and help.  All of my contributions will be at no charge as well.  You can find the Control panel free in sketchup warehouse (i'll post it).

I use mm instead of inches for more accuracy, The numbers can be converted using free, online mm to inch, inch to mm converters.  UPDATED 12/31/16

Thanks.