In an effort to get this business off pat I had two two hour lessons last week, just on this. Must say a word for Berklee Music Technique of the Sax, Rhythm Studies bk 3. Cant find it online but have ordered Creative sax studies intermediate/advanced by Berklee from Amazon. Have worked the Rhythm studies book before but never so intensly. Typically you get half a dozen bars with maybe six or eight notes in the whole lot. Nothing is predictable, nothing resolves, if you dont count you are finished. Was a bit depressed at my many failures till I realised at the back end of the book you are in the depths of somewhere beyond grade 8 (IMO) so back to normal stuff on Saturday and big big big improvement. If you can find this book or something like, get stuck in. Had to have it in a lesson though, its not easy to see where you are going wrong or right. When my new book comes I'll let you know what its like.