Thank you, to both of you.
I knew I had read it recently and I was troubled by the revelation. I have enjoyed Gerrold's work over the years, having both the "Trials and Tribble-ations" novel adaptation and "Star Wolf" collection. However, I agree that he does not come off well in the incident with Heinlein, made all the more maddening given how generous Heinlein could be. So, it saddens me in a way that I did not expect.
It's a real shame because otherwise Gerrold is pretty much as much an opportunistic jerk as Peters and Cushman are. The difference being that Gerrold seems to still have otherwise reasonable people defending him because of his asssociation with TOS.