Tips to install cartridge

Here's the easy way. Make a minor investment in some Mortite (plumber's putty) or Fun-Tak. Take a small hunk of it and roll it between your fingers until you end up with a cylindrical piece that's maybe an inch long and a quarter-inch (or less) in diameter. Use this to pick up the nut and hold it onto the end of the screw and then turn either the nut or the screw until the connection is made. A little practice and you can do this in seconds. Good luck, Dave.

Thanks for the great suggestions. Now I can approach my task with confidence!

Have fun but remember to GO SLOW. Do this when you have some true free time and are not rushed in any way. Be very patient and relaxed.