Thanks for the reply! Power is fine (went ahead and swapped out the regulator for the new one that comes in the cap kit.)
I double checked polarity on all the caps and they all are correct - big cap neg is toward the back, one by RF out is correct as well.
Beginning to think the color pot is bad - even though I see some changes in picture when adjusting, I have seen several posts since I first posted this with people complaining about grey scale with yellow and it looks like it is the color pot that is usually the culprit. I wrote Best electronics to see about ordering a replacement, so we will see when it comes in.