Except the tape/ …
Except the tape/combo square method only works for parallel cuts – angled cuts you need a chalkline or really long straightedge and make a pencil mark (for most of us, a few can hold a straightedge and cut with knife on those). Tape and knife is fine for paper covered long edge, best to use 4 ft T square on the long edge – some of the drywall boards have fiberglass impregnated and it plays heck with thskin on your finger (yeah maybe I’m a wuss but I hate stuff in my skin)

i want to see a …
i want to see a full video of drywall being put on dangit!!