I was fortunate that 72"x16" is a standard piece of lumber. This is exactly the perfect size for holding 4 DETOLF so I didn't have to do any cutting for the top/bottom pieces. That Canada pine.
I cut an 8 foot piece and 6 foot piece into 14 pieces that were 16"x12"; these will be the supports.
Measure twice, cut once. I messed up one cut (not this one pictured) and had to go buy more wood, haha.
Once I had all 14 supports/shelves, I trimmed a 1/4" strip off the 12" side to make room for the 1/4" plywood backing.
After many hours of measuring and sawing, finally time to start assembly (and frequent squaring). The supports/shelves are centered one foot apart in order to provide plenty of support. A DETOLF is a little over 1 foot wide, and since 4 of them means about 400lb of weight I wanted to make sure there was no way for there to be a DETOLF on here without a support directly under it.
I hope this doesn't turn out to be an amateur mistake that really causes problems later, but anyway because it was a half the price of buying a huge piece of plywood and having a ton left over, I cut up a 4'x4' plywood sheet in to two 1'x4' and two 1'x2' planks to fit across the 1'x6' back. This meant that where the two plywood pieces met that that particular support would not have the plywood screwed to it, but with 6 out of 7 being secured, I think it will be strong enough anyway.
All together. The piece on the top in this picture has a bit of a bow to it which is why there is a small gap there. Once I finished nailing the rest of the nails in, the gap mostly went away, and will go away completely when stuff is on top of it.
Plywood backing for structural strength to prevent the whole thing from doing a "domino" style sideways collapse when weight is placed on top.
Both of them finally assembled and with a first application of wood putty and sanding done!
