You know the fuel isn't "used" until its burnt in the engine right?.. I've been returning/draining fuel from my planes since day 1.. probably almost 40yrs now.. The only problems I've had were when I forgot to drain the tanks... one being if left in a tank for too long it will turn to gum/gell..(then its useless..as well as the whole fuel system).. another time when a tank plug decided to let loose/shrink... and it slowly seeped into the airframe/wood.. If you're ready for those issues.. just keep the fuel in your tank.. If you like to get the most out of your fuel and planes... pump it back into your fuel jug and seal it, store it in a cool dry place when not in use. There's absolutely no redeeming value in storing fuel in a model plane. Thats just my experience.

I also use the shelf-brackets... with pipe insulation for padding. They aren't cheap if you're going to do a whole wall.. but I've got mine in my "plane room" which is about a 12x14' room in the house where I do alot of my finish work and tweaking(and web surfing). I've got 15 planes and several wings on a 12'Lx8'T wall.. and some wings too. Two of which are very large. A 50cc and a 30cc.. and several .60+ size planes. The brackets are very secure... and I'm pretty sure it would take a large quake to bring anything down.. if theres a quake that big.. there will be alot more problems then my model planes(of which are very near and dear to me too.. but just sayin..)..