My handyman skills leave a lot to be desired but my banging on shit with a hammer skills are top notch.

I called a plumber to come out and troubleshoot my main floor tub/shower that has little water pressure. He couldn't isolate the problem. Ended up charging me $50 for the service call.

After he left I cut a square piece out of the drywall so I could access the plumbing behind the delta faucet. I took the cartridge out and opened up the water lines to blow anything out. I have a lot of old metal plumbing throughout the house that can cause buildup in the plumbing pipes. Still not working. At this point I took my hammer and banged on the copper pipes I exposed by opening up the wall. Bingo, shower pressure is back. I repaired the wall. Saved me hundreds or thousands of dollars. Plumber wanted $300 just to cut the drywall and $10K to replace the old metal pipes throughout the house.