Re: internal wastegate???
 

Don't lower boost!

14b (bigger then the t25, not much but bigger)
DOHC ZC
9psi
Stock Everything
Spike to 20psi 1-2 time(Ooops)

No problems yet.
ZC's can handle ocasional 12psi runs at the track, if not daily if your smart at doing it!

Plus lengthening the rod will give you lots of LAG!!!!

Keep her where it is and have fun!!!