Whew! I love it when a plumbing job works out.
I'm a great carpenter, a mediocre electrician, and a shitty plumber.
I have a $500 pull down kitchen sink faucet that was leaking (I installed it in 2015). I've repaired a shower faucet successfully before, but that had seats and springs. This kitchen faucet had a cartridge. I had to research how to fix it, as well as research the correct part numbers.
Couldn't turn of the water under the sink because I had to lay on my back and I couldn't get any leverage on them, so I shut off the water at the main.
Hit the handle set screw yesterday with some PB Blaster to let it soak in overnight. That still took me a good 5 minutes to unscrew.
Tried to remove the trim on the bonnet nut, it wouldn't budge. Wrapped it with electrical tape and tried again with the channel locks. The trim piece didn't come off the bonnet nut...instead, the entire bonnet nut came out with the trim piece still attached. So, I was glad I ordered a new bonnet nut because I had to put it tight in a vice, essentially crushing the old one, in order to get the trim piece off.
Plumber's grease on the O-ring on the new bonnet nut, installed like a charm. Took a good 15 minutes to get the handle back on, because my fat fingers have trouble with those little set screws. Everything is nice and tight now, no leaks, wife is happy. Less than 45 minutes, including clean-up.
Probably a $250 job if I called a plumber. DIY was less tan $20 in parts.
Money saved will be used for a fancy dinner at a favorite Italian restaurant.
I'm always on top of the world when even simple plumbing jobs work out, because I am really bad with plumbing. 
= new reply since forum marked as read
Once I got the cartridge and the bonnet nut installed tight, I turned the water back in and manipulated the stem in the new cartridge. No leaks. Then, I had to go down and shut the water off again to put the handle back on.
The kit I ordered came with two different sizes of set screws for the handle. The old set screw didn't work anymore, probably the threads were stripped. So I had to use the smallest set screw that came with the new parts, but that was too long. It worked, but since it was so long, I couldn't get the tiny little decorative cap to fit back on the set screw hole. That's ok, it is so small, nobody will ever see that. 
I found a great video. But you know how it is with videos...they make it look easy until you go to do it yourself, and find that everything is so corroded that you have to be inventive to get everything disassembled without breaking anything.
All home repairs seems to go the way this particular job did! Congrats on the opportunity for a nice dinner!
that is over 100 years old. it has been passed down through generations of the same family.
It's the kind of place you put a shirt and tie on for.
I'm looking so forward to going there again...probably in the spring.
but the alternator on the backhoe went out. 
(just drilled a new well, hooking it into existing pipeline. backhoe for trenching and a little side job filling in a sinkhole by the barn)
my little crescent wrench and Phillips screwdriver!
Sounds like a huge job, Kali. Good luck with it!
20 miles from the shop or town. 2 work trucks and another ranch truck.
I was ready to go rummage in my tool box but they found one eventually.
