replying to Senin, Richard Lilley wrote:
I had similar problems, but in the end iI won.
When using the plastic/nylon tool you have to be gentle with it. Instead of
forcing it to turn one way apply pressure right, then left, then right, etc,
and then it will eventually break loose. After that you can usually pull it
straight out with a good pair of pliers.
As far as disassembly goes, make a line up behind the sink of each part in the
order of removal, and when reassembling, just start at the end and work your
way along the line in reverse order. Taking pics as you go with a cell phone
helps too.
If you got it all together and the hot and cold is reversed, just remove the
parts installed AFTER the cartridge was installed and rotate the cartridge
with the plastic/nylon tool 180 degrees and reassemble. That will fix it.

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