Hi bensonmak,

It has been some time since I finished mine, but, as best as I recall, the instructions stated that the cabanes are purely cosmetic. If, however, you are going with a larger engine, they might not be a bad idea. But unless you first built the wings with with light ply anchoring points where you would screw the cabane brackets into the top of the bottom wing and the bottom of the top wing, you are going to have to do that first. And depending upon where you are in the construction stage, if you have the wing sheeting finished or not, it might be a bit of a pain. I constructed mine and installed them simply because I liked the looks of the plane better with them.

Good luck and please don't hesitate to ask any questions if you have any. I will be glad to help if I can.

Jeff