Yep,
To begin with, the footer was built of concrete block and the lumber started nearly a foot tall so, walls are almost 9 feet. I was sure that 2x6’s would carry the roof safely but, 2x8’s were less expensive so, I mod the trusses and screwed, bolted, and nailed it all together. Best thing I ever done, even if it did cost me a toenail. Being over 60, laying on concrete floors just wasn’t making a hobby more enjoyable.
24 x 40 isn’t big enough but, it’s gotten a little better.