Awesome man, great thread and writing it up well, Keen to follow
Looks like a nice example.
I am in a similar mind set, have had my 33 for 2 years now and still happy with 180rwkw, mostly stock and trouble free. Would like more, but cost to do it properly and then deal with the extra defectability, I'm not too fussed. I enjoy the car as it is, it does everything i want it to.
An alternative to a MBC is just to get a wastegate actuator from an R32 to put in (its 10psi), no need for any boost controller then so you wont get defected if cops look under the hood.
If you want to catch up for a chat and some pics and a cruise whatever let me know. Always good to meet fellow enthusiasts.