I just installed a Delta mobile base extension (for 52" Unifence) to my
existing Unisaw base and the foot lever hits the lower shelf. Is this
normal?

I called Delta and they are going to send me a replacement with holes
drilled so that this interference doesn't occur, which is great, but I can't
quite believe 1) that they made it this way to begin with and 2) that I
haven't read more comments about this in here.

Mitch Berkson