I agree. It sounds strange that it's because you need an electronic boost controller. However I can suggest you Blitz DSBC. I've got one on my RST. It's great. It has got 4 different pre-set settings which you can adjust to your needs. It has also more functions to eliminate boost spikes and lag... which I haven't yet tested because I'm still doing my engine running-in after re-building it

By the way can anybody tell how many miles do I need to make engine running-in after a full engine re-build? Thanks