I just felt compelled to mention lachoy's Class::Factory. I have used it with great success/maintainability in the past, and highly recommend you look through the source if you have not already. Thanks for sharing. :)

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)