I have the Option A setup using the FMSRE005 RC retract units. I am not having good results. My gear have started to fail to retract/extend properly and when I landed last time one of the metal trunions broke.
can I please ask you if you got your retracts sorted? I am also having problems with the Option A retracts on my Corsair – they seem to be very temperamental, sometimes they work, sometimes they get stuck in the middle when retracting. I have already spaced them up a bit as I thought that the metal mechanism hits the seating in the wing, and made sure that the mounting area for the retracts is completely flat, but still not reliable enough at the moment.
Option D looks like the closest fit for the eflite retracts. However they are not a neat fit as the holes dont quite line up. A shim will be required under the retracts to allow them to sit flat on the housing and sit clear of the base of the housing. The best solution would be an Option E version. Aligning the holes and build the mounting points where the retract sits in the housing by about 2mm. About 2 minutes work if you have the original design files.