Alright, so I've found the info regarding the color coding on the orifices (discharge ports). Goes as follows:

Black: .100"
Silver: .150"
Gold: .200"

Great. Now, the down side to this is that it confirms that I'm already using the largest orifice. According to AEM, their FPR's are designed with the range of 20 psi min. to xxx psi. max. of any high performance pump. However, I'm already seeing 30 psi static (vacuum disconnected and capped) with the adjustment set screw backed all the way out.

I've read about one guy who couldn't lower his FP's, but he was using a smaller orifice and didn't have any others. He got his brother to drill out the existing orifice to create a larger port. But even then, a .200" bit was used.

Aside from that, with so many variations between cars, parts, setups, and settings, I haven't heard of anyone having trouble lowering their FP's specifically with AEM's FPR (stock FPR's or crappy B&M's withholding). Okay, assuming AEM meant, for the sake of simplicity, 20 psi. idle pressures and not static? Still, I'm reading 29 - 30 @ idle with everything hooked up.

So what could be keeping pressures up?

A-dub