A few years ago when I first got into the hobby, I purchased this Vermont American router table  from Craigslist.

I'm in the depths of a shop re-org project(s) (adding cabinets, rearranging everything, cleaning...) and I realized that it nearly fits perfectly into the Ridgid R4512 table saw as a table extension.

I went ahead and removed all the extraneous parts of the router table and cut some mounting bracket pieces. It took drilling some custom mounting holes in the router table to match the mounting holes on the table saw, but now it's a perfect fit! I also removed the power switch from the router table and mounted it on the side of the table saw.

Since I rarely joint on the router, I'm still on the fence (heh heh) about leaving the router fence mounted or rely on the table saw fence when using bits w/o bearings. The built in dust collection w/ the split fence is hard to give up, though.