I am going to add the following and then hopefully this matter can be put to rest.
I am very familiar with
SNS3Guppy from two other aviation website. On those sites he goes under a different name, the name I will not say here.
On these other sites I have friends that know and have flown with Guppy and he is what he says he is and has done what he says he has done.
He does not bull**** people, he is no Walt. Admittedly sometimes he comes across a bit strong, but when it is all said and done, look up what he says on a subject and 99%* of the time he is correct.
So enough.
* To be truthful, I've never found that 1% that he is wrong about, but no one is perfect.