The doubt of Tapes made Comey tell the truth.
1. After the one-on-one meetings with Trump, Comey prepared a bunch of memos that contained outright lies and fabrications.
2. After he was fired, he sent them to his friend to read them over the phone to the New York Times. The whole charade was set up to ensure that nobody other than Comey and his friend ever saw them before they were leaked to the NYT over the phone. The NYT didn't even verify their authenticity by demanding to see them before running the story.
3. After Trump posted his legendary "He better hope there are no tapes" Twitter message, Comey went back and drafted new memos with all of the lies and fabrications scrubbed out. He gave them to his friend and to Mueller's office, and represented these as the real ones.
Hope doesn’t backfire or otherwise come back to haunt our great President because the scenario has been reduced to President Trump’s word versus Comey’s since other parties were apparently asked to leave the two alone together.
And Comey’s mentor Mueller is the special counsel, don’t forget.
Would be reassuring to know President Trump has some tangible proof to bolster him when the deck is so obviously and blatantly stacked against him.