On Tue, 05 Jun 2007 22:37:08 -0000, "
wrote:

its pretty common in hard water areas for sediment to build up in the
bowl rim holes, causing poor flushing. if flushing with a bucket works
good then i will goive you the acid answer

The two best answers, and if they work the OP saves $300.00 ! :-))

--
Oren

...through the use of electrical or duct tape, achieve the configuration in the photo..