since the top plate goes on last, it’s easy. Lay your unripped 2 by 4 in place one you cut it to size, and you will see the fron edge, towards the run, is what you have to rip. you can plane it as well. I marked to board on the ene. It’s a very small rip.
Have a few acres in Murphy NC on the Nottely River. Not much flat land. I am newly into hydroponics (Kratky) and BY and am awaiting my first six Black Star chicks (plus a Roo) and am building a coop. Looking for simple run ideas for a slopped yard Ro to attach to my coop build