Interesting, they have no Gball. Did n1chi@ stop using the Gball, or is this an older diode?
Have you tested output and divergence, say with a G2 at 10 feet?
NUBM44 with G2 is 2 inches at 15 feet
NUBM06 is 1.5 inches at 15 feet
and the 140/7875 is 0.75 inches at 15 feet.
With a wider block maybe the divergence is better? That would be a welcome change even if power was about the same.
I'll be surprised if it's under 9 watts.
Oh my!!! Subbing!!! Canned diode or Gball?