On mine, I just put the diode from pin 6, where the 220R was already tied, to the plate, pin 3.
Previously, I converted to triode mode by snipping the UL tap from pin 6 and using some tasty silver plated copper wire to jumper to pin 3.
As the diodes I was able to find were a bit overspec, I used the silver wires to tie to the monster leads :)
The amp sounds fine.
I have ordered some VH caps for the output coupling. A friend thinks they are 'really something'.
Will report after I put them in and get the required 400 hours break in on them ...