I also bought and installed the air scoops because they reccomended them. I have since taken them off and filled foam back in. They are worthless.

Just fill the back half of the plywood with velcro and place it as far back as you can. It works great on 830 and 340 pack. Best on 340. If your pack is too big, you may need to cut out some ply, or if it was mine I would stick with the smaller packs. I have not tried a 1320 but I think they are way off reccomending it.

Also, I chose the 1 aileron servo and glued it in. It was a TS-5 that was not good enough. I had to pull it out and it wasn't that big of a deal. I filled in the cabane support and put one HS-55 in the middle of the bottom wing underneath by gluing a ply piece just like the other servos. Works great. And added some micro dubro hardware and adjustments can be easily made.

Derek