"mywebaccts (at) PLUGcomcast.net" "mywebaccts (at) PLUGcomcast.net"
I was thinking that if I installed the miter slot first, then I could
install the laminate on both sides of the slot, having it butt up nice
and clean to the installed slot.

I'd probably rout the mitre slot first taking into account the thickness the
laminate I was installing to ensure a level fit. At the very least, if you
screw it up, you won't have wasted all the effort gluing the laminate and
then having to start over.