I replaced a hot water tank; after doing all the "I can do this" things, I turned on the water and all went well with the faucets in the upstairs bath, the main floor bath and kitchen faucets, the sink in the basement make-up room, the down stairs bath and the cold water side of the basement shower. The hot water side dribbled only. The other two sinks are down line from the 'problem'. I took the hot water control faucet off ( forgot to turn off the water) and found that there was AMPLE hot water pressure and hot water. I then found that the faucet/shower assembly are connected with a large copper Tee that wouldn't allow me to snake the tight corner. At a loss as to how to get the clog out of line

I can not undrstand from your info what you did or exactly what you were trying to do when you were trying to unclog something.

Please explain better.

I then found that the faucet/shower assembly are connected with a large copper Tee that wouldn't allow me to snake the tight corner. At a loss as to how to get the clog out of line Are you attempting to snake your water lines? If you had hot water up to the faucet the clog is in the inlet ports of the cartridge. Pull the cartridge and clean the ports. Good luck, Tom