You make some cool stuff Jim. If the guys that design some of that that stuff ever had to install it, they would not make that mistake twice!
I once had to carry a 12' by 7' bookcase around the back of a house, over footing trenches on 2 x12's, into a patio door opening about five feet high while standing on the plank. Oh, forgot to mention, the owner had some 1" mdf he got "a good deal on" so he used it up on this job.