Finally finished the top plate. Also had room for 1 row of spacers. The second set of spacers will be 1" thick, as I need an extra 1/4" for the E chain I'll be using. I drilled holes in the plate and spacer to glue them down, but I might just put pins in the holes for alignment and just glue and staple it all together.
Need to order a 4mm tap tonight for the linear rail bolts, as I want to tap the holes before I assemble everything. I'm hoping to get all the holes drilled and tapped this weekend.