WOW that is like the biggest picture I have ever seen, whatever it is a picture if the little bit I can see looks cool.

Also, be careful what you use to strap over the plane to hold it down, I have seen what appear to be soft straps make ugly marks on the skin of the plane from the vibration. My wife found some fleece from a sewing project she had, it was very nice to run over the straps.

Or just strap the spars as someone said very good idea there.