File_DNS Changes

I'm working on some enhancements to File_DNS and this is the first PEAR development I have done. I read through the style guides and best practices but I didn't see an answer to my question. The DNS classes we use internally are structured more like the Net_DNS package, we have classes for the resource records (Net_DNS_RR_A for example). The parser in File_DNS was superior to ours but was missing a few things we wanted and lacking a maintainer I decided to fork and work on the enhancements to contribute back. I have considered using the Net_DNS_RR_A classes within File_DNS or creating similar classes as File_DNS_RR_A. I assume it is more preferred to reuse the Net_DNS_RR_A class correct? If possible, I'd like to avoid the question of "why do you want to use classes for the resource records?", with the likely debate to follow, and find out the answer to the more abstract question of "is it better to build in the dependency or be more self-sufficient?" -Jonathan