Are the tools going to be installed in recesses built into the top or just mounted on the top?
Are you desiring the surface/table of each tool to be at the same height. Depending on the answer to previous question, this would be either the height of the top or the height of the tallest table.
If you are building recesses, you need to design the depth for a given tool. Consider installing levelling feet for each tool. These are not expensive and will save a lot of fussing with the top or the recesses.
I would make them all where the tools set low to the surface top and then use leveling screws or plan a board for the proper thickness to reach the correct tool height. The reason for this is if you try to build to the correct hight and you are off slightly high it would be hard to correct.
My RAS and SCMS are on each end of a roller, mounted to a custom built workbench. I had to mount the RAS lower because of its' depth. The key is to measure the height of the cutting plane for each tool that you want to mount, and then make a detailed drawing of the workbench with modifications for each tool height and where you want them mounted in the workbench.
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