I thought I might let people know that I discovered a change to the OID for Queue Tree Bytyes.
From what I can see this has been in place since OS3.2 and above.
OID for pre 3.2 = ".1.3.6.1.4.1.14988.1.1.2.2.1.5."
OID for post 3.2 = ".1.3.6.1.4.1.14988.1.1.2.2.1.7."
Hope this helps anyone else.