RE: X-treme Composite Altair 200
One thing I have noticed, the mounting point/ platform on the wing is not that strong. You can easily crush it if you over tighten the wing bolts, even if you use some relatively big flat washers to spread the load. In addition, you always have to worry about losing the wing bolts after removing the wing.
Luckily, I have some aluminum wing bolt retainers with a cap opening for M4 bolts. Once the bolt is inside, you glue the cap with epoxy, and you no longer have to worry about bolts falling out. Then, after you glue those retainers onto the wing with slow cured epoxy, you're done. The mounting bolts will always go in straight, and you will never have to worry about damaging the mounting platform.