Almost half of the letter is narc masturbation, the the rest is googleshng.
I worked on it a bit too and haven't found anything. I think we're safe to assume that "Veronica Ivy" is an attempted fakeout; he intends to change, or give the impression that he has changed, his legal name to something entirely unrelated.
It doesn't really matter. The moment he pokes his ugly manface out as he uses whatever new name he gets, people will immediately equates Rhys McKinnon with that super-secret agent moniker -- and they will make sure the whole internet know too.
BEWBS!!!!!! Genuine women regret their bewbjobs more often than troons regretting their dick hacks!
Rhys's argument, as usual, doesn't make sense. The troons that trooned out during adulthood are simply not comparable to kids who trooned out because of peer influences. Future statistics will tell, and the story won't be pretty.
The paper Rhys links to (NSFW for BEWB pictures) does not investigate "regret rates", and I don't know where did he pull the 6% figure. Indeed most clients reported greatly improved psychosocial and sexual well-being. The same cannot be said of troons and their penis butchers.
"MANY times the source doesn't actually say what the authors cite it for saying."
You just saw an example!
Google That! It Is Not Rhys's Job To Educate You.
He cites a small series rather than the huge
Amsterdam Cohort?

Way to ignore decades of Trans research!
Incidentally the Amsterdam Cohort convinced me that post-op regrets are low, but it also convince me that the modern trannies, especially those trooned out in childhood, are not like the old ones in so many ways, and one must be cautious when you compare them.
Who are you and where did you publish your paper?
The world don't care about your feelings.
Being spurned by the Troon Athlete of the Year award, and being put down by a real professional cyclist with sponsors (and being #Protipped by said cyclist), put Rhys in a mad mood.
Protip: try Hydrazine.
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Rhys considers himself an "energy teacher", although most of us won't call him a teacher of any sort at all.
In other words, Rhys prefers it when students argue among themselves so he can enjoy his Ambien zone-out.
Spoons!
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Rearranging a banana into a "pleasant peanut".
And God saw that. It was good.
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TL;DR.
OK Coomer.