Ok, thanks for the input so far, Ken.
FR401 is measuring 68.1 ohms.
R412 is measuring 26.9 ohms
C407 was replaced during the cap kit with a 4.7uf 160V cap that was in the kit and listed in the instructions for that location. However, I had this problem before doing the cap kit, so I doubt it is causing this problem.
What's next on the list of things to check? Any possibility it could be a problem with the tube? I haven't seen this tube work, but I have seen the chassis work. (Guess I could drive in to the shop tonight and hook my chassis back up to the Zaxxon to see if it is working, then try it on a different tube while I'm there to make sure the combo works together before coming back home.)