Looks like that did it, sync is rock solid now. Not always the exact frequency each time I turn it on, but it doesn’t move anymore. It’s a bit lower than when it syncing intermittently before too, and about where it was pre-mod if memory serves. I guess before sometimes it just happened to be at the right levels to sync and sometimes not. Also all output modes are working again, not just x3 and x4.
Thanks for the help everyone.