My original design was for the XB-36 which has the single wheel main gear. I had planned to go with fixed gear. There are photos of the XB-36 in previous posts.

The Century Jet Models retracts for this plane were $462 for a complete system. That included the 4 way valve to make them open and close slowly like they should. I think you can shave off $40 if you pass on the 4 way valve. I don't know if the $462 was because mine were custom/prototypes. You could always send them an email.

Mike