Hey Dan,
I hope the "ring my bell" pun was unintended.
Lippy, for a street-driven car, I don't think trimming the flange is a big deal relating to the integrity of the bellhousing. However, I fully agree with your number two statement - it would be a lot of work to take it apart just for that purpose and probably not worth it at this point. Maybe consider doing it when you burn that clutch up!
Kevin