First step was easy - roll up the sleeves one full cuff length (I do NOT have long arms - LOL!). Next, I gathered up part of the center back and secured it with a safety pin. I wanted to be able to take it out in case I need more freedom of movement. As it turned out, I had to let out a few of the gathers; while gathering eggs, the safety pin popped open as I was crawling under the roost to get an elusive egg.
I was going to leave the length alone, but a scooped hemline just isn't good for my wide hips, so I cut off the scoop and made it a straight hem. Probably should have left the front of the shirt a bit longer; men's shirts are not shaped for boobies. Even though I am not overly endowed, it's enough to raise the front hem a bit, making the back longer. Oh well.
This shirt turned out well, I think. I do love me some flannel! :)
(Oh, man...not sure I like pics of my backside! egads...)