Good job, Kimo.
I too replaced the pads on my wife's '04 RX330 (fronts only)
At 85K miles, her right side had just worn through the outside pad. The rotor needed turned so both sides done, new pads from Lexus of Austin $69. I opened the bleed valve on the calipers when I squeezed the pistons back into the calipers. This forced the old, nasty fluid out of the calipers. I used the mityvac to remove all the fluid in the master res, filled with new fluid and bled a couple times. All new fluid, new pads, like new rotors. Car stops like the day it was made.
Chris