Sounds like you guys are all local, check out the National G Club forum under clubs sections. I have the motordyne spacer since I got it when they first made it. I'd suggest shopping around for the MD spacer since I don't think the AA spacer is that cheap. And definitely install it yourself or have somebody in NGC help you. Unless AA is installing for free, take the time to do the simple DIY install. Let me know if you guys get a GB on the flash, I've been leaning towards doing that or UTEC.
note : I'm not trying to hate on AA or their spacer, just pointing out other options
~Khoa