Due to potential danger of this IMO its a bit reckless to suggest it without mentioning how to avoid the risk, so you should add to that "back off a soon as you hit you hit 15psi, or you could potentially damage the motor". And maybe also what this will achieve - "if the boost comes on earlier then you have a boost control issue. ". Perhaps the OP knows these things, perhaps not.
I disagree. A PROPERLY SETUP EBC will work at least as well as a t piece, and should work better.