Yes tightening the trunnion bolts allowed me to get the splitter on.
Even better news was that once it was all bolted back up and tight, the blade to miter slot alignment was 0.001". I remember now as I was doing this that I had loosened the bolts to correct the alignment (it was around 0.009") a few months back but got sidetracked (had twin baby girls). I had to finish a job recently and they must have worked themselves really loose. It was at the end of this job that the front of a board jumped on me as I was ripping and the kerf on another started to close that got me really nervous and triggered all of this.
All is good now, tuned up and safer....
My new shop protocol is that if a machine is left not ready to use, leave a note on it, you never know when you will be back.