Dean, I know you know what you're on about and I know Tom asked for a simple diagram but in addition to your diagram I would personally program one of the digital inputs as a STOP/RUN signal. For me this is standard procedure such that you have to select both RUN and FWD to get output. While it's not used in this application it makes more sense when you want to change direction.
Also Tom you say you don't mind switching it on and off yourself for the time being, I'm not 100% how you intend to do this but there is a big implication. If you use the control inputs to stop/start as in the diagram above then the spindle will ramp up and down so that the motor is not strained on startup and the VFD will bring it to a stop quickly, however if you switch power on/off to the the inverter starting should not be affected but switching it off means the spindle will coast to a stop taking much longer because the VFD has no control and will not be braking it.