This is the stand that i want to build, out of 2x4´s and ½ in plywood, It is going to stand 51" of the ground and support a tank that is about 55" x 23" x 16" High (about 89 gallons US / 336 liters). I am wurried about the stand, beeing that tall that the 2x4´s would bend from the weight. This...