ORIGINAL: spyder0069
I see a few differences in your plane. My landing gear is regular straight 5/32 rod. Yours has the loop. Also mine has 2 plywood wing reinforcement pieces that glue over the holes for the nylon wing bolts. I didn't see those on yours. I didn't actually use the strip of monocote they include to cover the wing joint. I used the 2-ton epoxy that cures in a couple of hours so I got a good bond that looks good without the tape. With the FS-91 it balanced perfectly without any added weight. Receiver pack still is mounted to the side of the engine mounting block out front.
The 3-blade and larger spinner probably also help.
Although the instructions do not mention a wing bandage , imo, it is essential that one is fitted. Also I have read above that some are using a .40 size 2-stroke engine which, imo, is well underpowered.
The supplied coiled u/c legs were angled too far forward on mine at about 40 degrees which was excessive. So I removed the legs and bent them more rearwards.
Even with a .53 2-stroke fitted with a 12 x 6 prop I regard my Zero as just above adequately powered. She's a nice flyer however and lands smoothly.[8D]