I have a pile of mixed wood (some pine, mostly hardwood) I got today in a two cord drop. It's all green and I want to season it over the summer so it;s at lwast pretty good to go by later fall. I built one of those racks using those metal brackets that take 2 X 4s. I'm having a problem with the splits being less than the two foot width of the rack. What's the best way to shore it up, a big piece of plywood to close up the ends or a few 2 X 4s? Thank you.