I'm all for the MBC in parallel set just above the N75 to avoid any spikes.
I was just curious why you wanted to use one at the time as there's no real reason to lower the k03-chip-boost when running with K04s, and I wouldn't use an MBC-only setup to raise boost if you're still running S4 injectors - they're already maxed out with the k03 boost levels.
I think sometimes people want stuff just because others are using it and not fully know why the want it. I just wanted to make sure you were informed and had good reason :)
Mark P

Dyno: 469wHP / 451wTQ
93 oct - best 60':1.734 | best 1/4ET:12.239 | best 1/4mph:116.58
100+oct - best 60':1.698 | best 1/4ET:11.762 | best 1/4mph:121.72

ECUx template version 11.16 (3/12/07)
AWD Dynos by State - Race Gas in New England - B5S4 100k+ mile post
Current:
'02 Audi S4 Avant, Imola Yellow, APR Stg3 - imolavant website - 185k miles
'01.5 VW Golf 4dr 1.8T, Satin Silver, GT28R, EPL-tuned - 14.8 | 101mph - 195k miles
Previous:
'00 Audi A4 1.8T, Silver - Quattrobonium website