"Source 3" was the same source behind the debunked Cohen-Prague claim, which may be Russian disinfo.
"Source 5" had a Russian 'kurator,' or handler. dailycaller.com/2020/07/20/ste…
He noted that the memo says Steele communicated w/ his primary source by Skype, app and phone.
This shows Steele did not have great insight into his sourcing chain
If Steele's source is to be believed, Steele added other details to the dossier that the source did not provide.