RE: which way is better
G'day
I store most of mine horizontally. I got some 3 x 2 pine, fixed two vertical strips to the wall about 3 feet apart, and then got some 3/4 inch dowel and drilled 3/4 inch holes in the pine and pushed pieces of dowel into the holes. The holes don't go all the way through. I don't bother to glue the dowel in, they are just pushed in. The dowels for the fuselages are about 1 foot apart vertically. Then I made a similar rack but with the dowels much closer to store wings on. It was cheap, simple and can be easily pulled apart if I need to move it.
Mike in Oz