So i think i fixed my leak. i replaced by shower cartridge and the shower leakage went from a cup an hour to 3 to 4 drops over 8 hours.
So, am i being anal of wanting to stop the 3 to 4 drops, or is this normal? If not normal, how can i fix it.
As for the water pressure, i finally figured out that shower heads are rated in GPM and some even have a PSI measure. Currently, i am using a niagara shower head with a 1.25 GPM. I am guessing its going to produce some low pressure. So i am going to replace with another unit, something closer to 2 GPM, i think.