I have wired my table to be able to support a breaking system - but upgraded controllers and power supply are somewhere down the road. I have attached the schematic I used to wire the table. Note lanes 2-4 are the current scheme - Lane 1 is my proposed modification so I can continue using my stock power and controllers.

I should have added - Does this seem correct - will the proposed changes to lane 1 work with the standard power supply and guns from the Tomy kit? Like I said somewhere down the road I want to upgrade the power supply and guns.

I don't think the power supply is an issue. You may have a problem with the standard Tomy controls. The control has to be wired for brakes. I use Parma controls and they have a third wire for brakes.