That's what I'm thinking as well, going to run thru the IF alignment again and keep a close eye on the sync & burst using both the sweep/marker and actual video to see how things are interacting. I'm sure it's something I'm not doing right but can't put my finger on it just yet.
Going direct composite gives similar results however I can't get my DA to go much higher than 1.5V P-P from an unloaded output. It does however make for a very nice picture without all of the lumped bumps from the coils along the way.
You should see what my cat did to the set earlier today, it's posted here on Audiokarma... and I'm not too happy about it.
https://audiokarma.org/forums/thread...#post-18377210