Understanding the cathode follower D-ulator

[Bob-I]

I haven't been totally satisfied with my built in Dumbleator amp so I checked out the signal flowing through it. Turns out the CF in the D-ulator is clipping the bottom half of the wave form. This happens with both a 12AX7 and 12AT7.

I have a 1M grid, 1.5K to cathode and 10K to ground. I believe the tube is hitting cutoff so I'll need to adjust some of the values. I believe that raising the cathode and ground resistors are the way to go, and a search confirmed that some folks use 1.8K and 27K.

Am I on the right track?

Also, I'm using a single node on the PS. Is this a problem?