This sounds really wrong.
maybe i am not knowledgable enough , but it looks to me like a way to patch their 3071 software to your turbo.
as far as i understand , revo have a software that was optimized for use with gt3071r with an A/R of 0.63
you on the other hand are going to use a 2871 (what a/r?)
now , working with manual boost controller would either mean that they don't want to spend time to optimize boost in the software or they do not know how since they have no test car with the setup.
in any case , Afaik there is no way to uploade to the computer variable maps based on constant changing boost and you will probably be running either too rich or too lean , and with a software not optimized for your turbo , so power will not be brilliant as well.
i would love to also hear from REVO what is the reasoning behind external boost controllers. this is from the 1.8t age , really never seen it work well with the 2.0Tfsi