Just for symmetry you should put in an 8X5 overhead.........you know, for the Olds.
Congrats on the shop Sam, can't believe I'm jealous over four posts sticking out of the ground.
Way to go Sam!!
Nothing like putting a man in "his " place.
I do agree with OldIron, build as large as you can.
No matter how big it is you always wish you had more room.
I gotta agree with some others here. I built mine 30x40 originally. Couple of years back I added another 12' width to the entire length making it 42x40. I still think it's not big enough when my collection of "stuff" is in disaray...ok, I'm a pack rat