Finished the Power Window fix per @LA Z (upgrade to the fix first posted by @slcfj62). The window relays are direct wired to the battery (fused) with a local ground. All switches operate as they should and I no longer have lazy windows. I had previously replaced all the window channels, lubed the mechanisms and rebuilt the driver's door relay box (actually...@Spook50 rebuilt the green box). Those changes made the front windows OK (up-down in about 5 seconds), and greatly improved the rear windows from barely moving to 6-8 seconds up). The rears now go up/down in 4 seconds flat after relay install. I'm ready to add the vapor barrier and forget ever opening these doors again.
Video of before/after for rear windows:
View attachment 3124740
Got a link to the upgrade thread and any pointers to make it easier?