Have you considered using a hybrid boost control scheme? This would involve using an interrupt type (3port) EBCS in conjunction with the MBC. You'll have the same lightning fast spool as the MBC without the part-throttle full-boost (PTFB) events that plague MBCs. Furthermore, you get the safety of operating with an EBCS.
I wouldn't plan on installing a bleed type OEM EBCS back into the car... you'll be very disappointed with the boost control... and as long as you or your tuner tunes the WCDC tables properly, you won't need the restrictor pill.
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