I got the book Green Beats today and was looking specifically at the Tenor part in Schleights. In measure 13 (right at "C") there is an odd part on the first partial of beat 3. It is a R on drum 4 (drum 6 counting the two shot drums) but it doesn't flow very well with the phrase. Just wondering if it should be drum 3 (drum 5 counting the two shot drums).
You are correct. That is a typo and should be played on drum 3.
At rehearsal mark C, count "3" of the tenor part should have the right hand playing on drum 3, not drum 4. This error has been corrected for the downloadable 2007 Cavaliers Tenor audition packets.