Great website link Pete!
Beside the FET replacement procedure, he describes G2 adjustment (step 10), which was also a huge help for me. Sure enough, the G2 for all three crts was set too high. I readjusted them and did a top to bottom calibration (as well as "I" could anyway). After replacing the hushbox I watched ~2 hour movie and no problems with the crts. I'm going to keep my fingers crossed and if it can go a few more movies with no issues, then, hopefully it's problem solved.
I looked at the pictures on Lynxxx's web site and I didn't see that type of FET issue with mine. Could it have been that the red crt was just being overdriven?
In any case the picture looks better than ever. I let you folks know if this pops up again. Thanks again for the help!