Not sure on that but I'm thinking that the 80 ones probably dont have ported vac (& the earlier ones may not either) which is preferable in most cases. On your deal I'm wondering if the bowl is warped. EDIT worded that backwards, meant to say ported is preferred (most cases)

Last edited by RapidRobert; 02/28/10 12:31 AM.
live every 24 hour block of time like it's your last day on earth