The other thing to think about is how you will align the tool height to the spindle centre. If you are going very simple then the surface the tool sits on needs to be on the low side so you can shim up to suit each tool. You can't shim down.

More complex arrangements are a quick change tool holder with a threaded height adjuster per tool. I would have a look at this option as it makes tool changes quick without dialing them in each time or keeping a set of shims per tool.