Originally Posted by iNVAR
1) Do not install that EBCS unless you are putting a tune onto it immediately.
This. You basically want to install the BCS at your tuner's place of business and/or literally right before your tune. If for some reason that's not possible, short-circuit the boost control system for the time between install and tune by connecting the wastegate actuator directly the air outlet on the compressor cover with a short length of hose.