No you are not barking up the wrong tree. Poor control is a common complaint because all of the set power supplies have too much voltage (making most cars too jumpy) and too little amperage (makes motors run hot). The adjustable power supply sounds just about perfect for any 1/32 scale slot car, but it will need to be wired directly into the track, in other words do not use the Sport power base. A more affordable option would be a twleve volt one amp power supply.
The other item to consider is the controllers. For a small temporary track I think a 35 ohm or 45 ohm would work good with the twelve volts. The Parma Economy controller has just been improved with a new nylon trigger making this an excellent controller.
The other item to consider is the controllers. For a small temporary track I think a 35 ohm or 45 ohm would work good with the twelve volts. The Parma Economy controller has just been improved with a new nylon trigger making this an excellent controller.