- http://www.thatchercx4.com - Thatcher Aircraft, Inc. The official website for CX4! About, Ordering, Specs, Parts, etc.
- David Thatcher - email to order Canopy, Windshield, Front windshield retainer, Canopy and windshield bows with skirts, Canopy latch, Stick & elevator control with boot Rudder pedals and assembly, Elevator horn, Exhaust system , Nylon bearing set
- http://groups.yahoo.com/group/CX4 - Online forum for CX4 builders and enthusiasts
- Peter Beck - email Peter Beck about Pre-maid spar, Pre-maid ribs/bulkheads or Quick-Build Wings &
Fuselage - Earnest Martin - email Earnest Martin about Cowl, Wingtips, Wheel pants
- http://www.wicksaircraft.com
- http://www.aircraftspruce.com
- http://www.greatplainsas.com - they also have the gear, wheels, brakes, spinner, etc. for CX4
- http://www.airpartsinc.com
Engines
- http://www.greatplainsas.com
- http://www.hummelengines.com
- http://www.aeroconversions.com - need to make a custom motor mount (not per plans)
- http://groups.yahoo.com/group/AirVW - Online forum for VW engine conversions for aircraft use
- http://www.sensenichprop.com
- http://www.tn-prop.com
- http://www.greatplainsas.com/ed.html - Ed Sterba
- http://www.princeaircraft.com
- Aymar-DeMuth Propellers 8213 Elberta Dr. Ellicott City MD 21043 aymar-demuth@juno.com
- Dave Thatcher Video 1 - Dave Thatcher - Sun-n-Fun 2005: Part 1: Forming ribs, spars, fuselage skin relation to wing
- Dave Thatcher Video 2 - Dave Thatcher - Sun-n-Fun 2005: Part 2: Control stick, bending metal
- Dave Thatcher Video 3 - Dave Thatcher - Sun-n-Fun 2005: Part 3: Bending wing skin, riveting, windshield skirt
- Dave Thatcher Video 4 - Dave Thatcher - Sun-n-Fun 2005: Part 3: Caulking, top of fin & bottom of rudder, canopy bow, canopy, flight characteristics
- EAA Homebuilder’s Hints - Great videos on different aspects of homebuilding