Dont over tech this wing relies on the covering for strength . even if it was built straight it is easily twisted when covering. and if you straighten it with the heat gun it will stay. This is a very light wing with little structure. This is a very good plane with light wing loading it is the next step from a trainer. The orange one I pictured is 2 years old with more than 200 flights the only weird thing it does is its slow to recover from a flat spin.