Just ordered a set for my electric powered H-9 Corsair. I've put up with the stock retracts long enough (a little over 3 years now). Kept thinking I should replace them, but really didn't like any of the other options, and any of the others would have required more work.

From what I see: what is not to like? Scale retraction, I'll be able to use my 5/32" diameter titanium struts, with RoboStruts attached below the spring loop. Without the ball links: I should be able to mount operational front gear doors.

Someone asked about weight:
Lado lists these units as weighing 3.4 oz each. I assume that is without struts, but WITH controller.
H-9 retract unit only weighs 2.4 oz each without strut, so they are 1 oz lighter each.

BUT, you can remove the retract servo (1.2 oz?), the bellcranks and linkage, and then they should be pretty close to even in weight.