Well, Thanks everyone. Very helpful. I decided to repurpose the sewing table for something else and start with a clean sheet. Here’s what I got so far:

The sides rest on steel angle iron into the wall studs and I mounted a blem 1-3/4 bench top from an industrial supply house. Seems plenty sturdy. I also ordered a flush mount from Inline Fab. I’ve never used a router before, so that might be an install adventure. The final dimensions are 41” wide by 36” deep. Next question guys, Where do I mount it? I’m right handed, so I’m thinking off to the right. Any thoughts on how much room to leave from the right wall? I don’t really want to mount it in the middle because the base plate extends 1-1/2” from the front edge and that could make it uncomfortable to use the space for other purposes. Thoughts?

The sides rest on steel angle iron into the wall studs and I mounted a blem 1-3/4 bench top from an industrial supply house. Seems plenty sturdy. I also ordered a flush mount from Inline Fab. I’ve never used a router before, so that might be an install adventure. The final dimensions are 41” wide by 36” deep. Next question guys, Where do I mount it? I’m right handed, so I’m thinking off to the right. Any thoughts on how much room to leave from the right wall? I don’t really want to mount it in the middle because the base plate extends 1-1/2” from the front edge and that could make it uncomfortable to use the space for other purposes. Thoughts?