DO you honestly not know what VCDS is? http://www.ross-tech.com/
I only asked because why wouldn’t you just use VCDS (VAG-COM) to log AFR and other parameters? Unless you just want a cool gauge it seems like a waste, and I think a Ross-tech cable would be much more beneficial.
I asked about the boost controller because I personally would prefer an electronic boost controller. An EBC is a little more complicated but will give you much better boost control with possible options of boost by gear and could also control spikes.
I also don’t think manually adjusting boost is a good idea, unless your sure that the tun will adapt to the boost you are requesting. I’ve seen a lot of guys try to crank the BOOST up without thinking about the other things that need to be changed. Regardless of the longevity of your turbos if one of them eats itself you may be sacrificing the built motor that took forever.