Thanks everyone. I'm sorry I have so many "pieces" in my model. I'm trying to save everything in case I have to rebuild things. Which I've already done a few times. BTW, I didn't fillet the solids before routing.

Yes, trem rout is the stuff related to the routing of the trem pocket. I think I left the curves with the extrusion used to create the solids. I believe when you extrude from curves the curves are left behind.

I was going to try different paths to try and fix this, but I wanted to make I knew what was messing things up first. Looks like boolean diff got confused when I used the multiple solids. Also, merging via boolean union got confused because of the coincident surfaces. I thought boolean union liked it when you "bury" one solid into another. I guess this isn't the case when you share large regions of surfaces.

I'll try trimming and union and also the project and extrude methods to get some practice making the "routing" solid.

Thanks again!