I guess I'll add some more and answer the next questions that will probably come up.
What about retarding the timing under boost? Again, another piggyback computer can change the timing based on rpm and boost pressure.

Before I get too far along I'd like to say that I personally like adding the piggyback computers because they are user adjustable. Unlike a ecu tune that has to be tuned by a company if you ever have problems. Generally speaking, if you tune to 11.5-12:1 AFR you will get about 90% of the engines potential power safely.