Kinda hard getting into this shop work

Well I’m glad I had my buddy got through the transmission. It came with my black Duster when I bought it and had a Cope (crt) 727 in it. Pretty sure it’s been rebuilt at least once before. It had stock clutches in it and a stock band so now it has better clutches and an extra one and a Kevlar band. I was also glad to see a billet drum in it. He plans to change to a powerglide down the road so with the good drum and transbrake I should be able to recover a few bucks out of it.
You don't rebuild your own transmissions?..
I assume it's so easy that it's a waste of your time...