Belly Brake install
Other examples I used for ideas included;
Dan Heath
http://krbuilder.org/BellyBoard/index.html
Mark Jones
http://www.flykr2s.com/bellyboard.html
Mark Langford
http://www.n56ml.com/n891jf/speedbrake
Actuator supplier
http://cad.actuator.com/product/85915-85916-linear-actuator/85615-85616-linear-actuator?
Wiring diagram
http://www.progressiveautomations.com/images/pdf/rocker_switch_wiring.pdf