As mentioned in an earlier article on the Hobbyking H4, some of the cons were the landing gear and the thin alu booms and the carbon motor mounts. After a few what i would call relatively normal landings, the landing gear bent and after som time of benting i opted to dismantle the gear. The carbon motor mounts are relatively thin and broke. I replaced these with som alu mounts from hobbycnc. The booms also bent relatively easily so i replaced them with a stronger and more relaiable version.
If you are looking to do the same on your H4, check out how i went about it.
I went to my local hardware store and purchased a electricity box, they come in all shapes and sizes. I grabbed one with the thin rubber pods on the side so the I lead the wire into the box.