Not got a full answer to the question, but here's what I think is correct timeline.
![Undecided :-\](http://www.radbmx.co.uk/forum/Smileys/smilies/undecided.gif)
Someone correct me if I'm wrong.
![Smiley :)](http://www.radbmx.co.uk/forum/Smileys/smilies/smiley.gif)
BMX Action Bike first issue
1976 1982
BMX Action & RAD from May 87 Issue 52
RAD only from June or July 88 Issue 64 or 65
Hope this helps.
![daumenhoch :daumenhoch:](http://www.radbmx.co.uk/forum/Smileys/smilies/daumenhoch.gif)