Doh, I started putting together my battery rack, and realized that the last minute changes to the plan, of slightly reducing it's width, has resulted in each shelf only being able to support 2 batteries, not 4. Technically 4 will fit, but it will be physically impossible to actually put them in. Maybe I'll be able to, but I don't think I will. Once it's actually built I'll be able to try for sure. Hoping to finish that tomorrow.