Full disclosure: I'm the Rex in "By Rex" But this is one of our better blog posts and I thought HN would like the info. You guys were hugely helpful a few mont

Full disclosure: I'm the Rex in "By Rex" But this is one of our better blog posts and I thought HN would like the info. You guys were hugely helpful a few months ago when we did an Ask HN. I thought I'd share some of what we've learned since.