Will be following this thread closely as we got a few of the US40 delivered here a few days ago.

This is the info on the retracts. Their site showed "Out of Stock" Below is email and reply FWIW.

To: [email protected]
Sub: you show out of stock
Item: Home > LANDING GEARS & WHEELS >
Mechanical Retract Main Gears (2-PC SET)
When do you expect to have them in stock? Will you send an email when they arrive please.

Replied:
mid feb
Thanks,Paul G http://3dxhobbies.com 732.406.5726

These axles should work with the 3/16" struts. Look on 3DX site and could not locate any. http://www3.towerhobbies.com/cgi-bin...?&I=LXK183&P=0

Pictures and comments are great.