To clear up any questions and doubts about the Secraft Retracts for S800 ...
The first set of SE Retracts never gave me any particular problems, they certainly didn't get stuck, but good ole Sang immediately sent me v2 retracts anyway just because I wrote an email asking what exactly is this 'sticking' problem I have been reading about? I also mentioned that they were a bit wobbly in the down position.
The v2 retracts wobbled even more in the down position, the reason being that their 'fix' was to shave a hair's breadth off the moving hinged portion so that it could not bind against the housing. The big disadvantage with the v1 & v2 design is that the legs are only driven to the 'Up' position. Lowering the legs relies upon gravity. No amount of sponge pads and dampers could eliminate the wobble without stopping the legs fully retracting because only one leg would go up the next time, indicating that the immobile leg had not fully locked in the down position.
Anyway, in the end I could not live with the wobble and told Sang that I was sending them both back for the refund that he had offered. In the meantime, however, v3 had been announced so I upgraded instead. The v3
SE Retracts-Pro for S800 are just as smartly made and finished as the previous two iterations but the mechanism is vastly superior. The legs are driven in both directions and the action is
silky smooth. The new mechanism does not permit any wobble. Time will tell whether it remains that way.
A quick look at their webshop photo will show you how good they look - sorry Heinz. Yours are far too agricultural in appearance. A pair of v3's with associated linkages etc. weighs 295g - well less than 50% of the DJI effort with its ugly spring and string arrangement. Another point is that Secraft do not insist upon a separate supply voltage for the v3 retracts. It is just two servos that can be driven directly from the Rx - although I will use the BEC since it is already there.
Of course you must take some care with the Tx switching. You don't want to accidentally toggle the Retract switch whilst still on the ground. The Futaba 12Z permits Logic Switching whereby a combination of various switch positions can be programmed for an eventual action. So, for example, I have it set such that the S800 has to be in Atti or GPS Atti mode and the Z15 has to be in H.Free mode i.e. full 360° mode, before the third switch for the retracts will even become active. As soon as any of those three switches is moved i.e the Z15 is returned to H.Trace or FPV, the S800 is switched to Manual, or the retract switch is toggled OFF, the legs will go down. Tx Failsafe is also set so that turning off the transmitter brings the legs down.
Secraft still sells the v2, presumably since they made a whole bunch of them, but it ain't worth dabbling with. Pay the extra and get v3 retracts that you can install and forget about.
Or you can go the tractor route and pimp your copter

. Sorry Heinz, couldn't resist.