I need a few cast iron saw extensions for a project. The SawStop ones claim
to be ground to within .0001. (I will be surprised if they really are, but
very pleased.)

Rockler has them for less, but after the heavy freight charge they are much
more expensive to my door.

Woodcraft shows basic shipping as free saving substantially on the net cost.
Other than the 7-10 day lead time per Woodcraft are there any issues with
Woodcraft?

FYI: This is for a metalworking project, but since the basic frame work
pieces are associated with woodworking tools...