I will say to BEEF up the center section wing spar! Mine exploded in flight......I thought maybe somebody shot me ....the airframe EXPLODED in the top wing area causing the left TOP wing to separate and take the lower right wing with it! I fly IMAC style aerobatics, lots of snaps etc....no 3D flying with a DLE-55 RA. I was thinking about ordering another one....if I did I would probably just put a DLE-35 in it and fly it like a Sunday School teacher as it is not build very strong. :{
Once I could see inside the wings you can see the light and cheap balsa was used.....real bummer!
I had a lot of fun with my little red S-1S Biplane, reminded me on the old Byron 1.3 scale .....I wish RC Guys would upgrade the kit and bring it to the modern ARF standard like Hangar 9.
Sigh....