I had a special request for a large container to hold top off water for the 199-gallon sump I built. The customer requested two quotes, one for 1/4" material and one for 3/8" material. In the end, 1/4" was selected although 3/8" would have been the better choice. Also, I had a special order for a fan bracket for a sump I'd already built. The fans are 4 3/4" square, but the power plug required one ...