My B2200 is running, I'm using closeout clutch master and slave cylinders purchased from Rock years ago. Because of my experiences with B2200 clutch hydraulics I decided to carry along spares for these, and those will be my replacements from Advance. Right now I have the replacement MC and a close-out slave cylinder as spares.
Also I had purchased a water pump from CarQuest/Advance with a lifetime warranty, but think I'll be done with Advance, just too much hassle...
Funny, the clutch hydraulics on my 1998 Nissan Frontier lasted over 265K, never flushed the system until I installed new MC and SC into it. My 2004 Frontier is still on its factory MC and slave cylinder, and the system has jever been flushed; on both of these Frontiers the brake master, calipers, and rear wheel cylinders are factory, and have never been flushed.
I always flush a hydraulic system completely after a hydraulic repair. The B2200 has been through several brake master cylinders and at least one replacement of its calipers and rear brake cylinders.