V4 Rules

[KirkH]

I'm a PG player from way back but haven't played in quite a few years.  When I did play I used the V3 rules exclusively.  Part of the reason I put my PG playing on hold was because I was waiting for somebody to create a version of the V4 rules showing what changed.  I'm thinking of playing again and would like to try the V4 rules, but would hate to have to reread every word and bounce them against the V3 rules to see what's changed and what hasn't.  Does anyone know if there's some sort of cheat sheet that identifies what changed?  Thanks.