I don't known if you purchased an engine for the plane, if not I used a FPE 5.8 and it balanced right on. Vertical is unlimited and lands vary nice. I would recommend phenolic wing tubes; you can get them from TNT Products. When it comes time to glue in the wing tube screw blocks there will be a gap between it and the tube. I fulled it with epoxy it makes a stronger set up.Then when you tap the wing tubes it will not only thread the tube it will put threads in the epoxy so they won't tend to come loose. The wing tube acts as the shear web, but there is none beyond where they end. I put vertical grain webs in the next five rubs. Not much weight for the peace of mind. As for lennyk's recommend cowl mounting idea, that is what I did, makes for a much nicer looking set up. Good flying plane I'm sure you will like it!