Yeah , mine was bought second hand from my buddy Greg Simpsion so I did those mods cause the linkages were old and sloppy, plus I used the smallest but powerfull servoes back there and used standard size servoes up under the canopy area for my nose gear and a micro for the gear. I rigged up springs on the doors so they lean slightly against the struts and close and open very nice!!
my air tank is in the nose in front of the gear door as well as my 7.4 1200mh batt plus I added a 2oz header mounted on top of my 16oz so I hope that helped componsate for the servoes out back but I haven't checked the cg yet but it is only ten pounds wet .

Let me know what you think sean

Mike