Yeah, Ben Heckendorn is one of the first, and one of the best (if not the
best). He's pioneered the way for everyone else. I frequent his forums. They're intended specifically for people building their own systems to help each other out. It's actually not too hard to build one if you've got some soldering experience. Most of the people who build these things are teenagers (even some preteens). If you're interested, be sure to check out the main reference site
created by people from the forums.
I've personally built an NESp and a PSOneP. My PS2p will be more along the lines of segasonicfan's
, rather than Ben's
As far as the analog shoulder buttons.. From the information you guys have provided in this thread (and also the one I cross-posted on GameFAQs), it seems there aren't many games that make use of it. In the shoulder buttons specifically I mean. And the ones that do...it's not going to make a big difference. But, still, I've decided to go the extra mile and make them analog by using a third-party controller that is more easily modable.