• Albamodel - Japan
   
• Dirk Pflug
   
• Jo Grini - Norway
   
• Mustang hobbies
   
• Petter Ostbye - Norway/Netherland
   
• Skip Miller - USA
   
• Soaring USA - USA
   
• South Coast Sailplanes - UK
   
• Spec'd Out Sailplanes - Canada
   
• Slowflyer AG - Switzerland
   
• T9HobbySport - UK
   
• Airtronics

Others

• Kevin Newton with reviews
   
• www.f3j.it