This plane flies nice.  Flat bottom vs semi semetrical = Semi flat bottom is what I would call it, mid way from the spar to the leading edge is curved on the bottom side.

Landing gear = garbage.  The landing gear it shows in the directions is nothing like what comes in the kit.  The main gear are shaped like the landing gear that mount on the bottom of a high wing trainer.  Nose gear bent easily.

Bent my own gear out of 5/32 nice!

Engine mount = suposed to be for a .60 size, I don't think so, the mounts are too wide ended up rebuilding mine with carbon fiber much better and solid.

Make sure and re-glue everything you can reach,  mounted .70 four stroke as far forward as I could, aluminum spinner, battery as far forward as possable, have extra electronics and batteries as well all mounted as far forward as possable still had to add 3 oz to the nose.

Upside its very stable and works very well as my UAV test platform.