Does someone knows the real difference between those boards PM-41, PM-41 (A) and PM-41 (2) (A) ? - PM-41 - I saw that exist on wiki page; unfortunately I didn't find a picture with PM-41 simple without the A - PM-41 (A) - http://tiny.cc/PM-41-A - PM-41 (2) (A) - http://tiny.cc/PM-41-2-A What I know for sure is that PM-41 (2) (A) is the last revision. Thanks!