Router Build number 2

[charlieuk]

I know it may not be exactly the perfect way to do it but I'm still trying to think of ideas to allow me to achieve both goals and was wondering about doing something like in this pic wether its from ali or steel and that is to have some removable plate that bolt to the side that interlock into the frame that would give extra stiffness for when I want to cut ali however could be removed as and when I want to cut ply. This would also allow me to use the narrow gantry layout.

is it a workable idea or not worth the effort?