• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Aikido with 6C45

If you can get them tightly matched, you should be good. The circuit will be the same as any other Aikido, except the cathode resistors and the "Aikido" resistors will be different.

The curves look similar to 1/2 of a 6N6P. Try 240R for the cathode resistors, and about 250V B+