I wouldn't bother with VTNZ/Testing stations. I take my mums car(323) to the same local garage we've used for many years and if there's a problem, they fix it...and the car gets a WOF(whatever it costs). They used to happily do the RX7 too.
The GSR is the same. I have taken it to the same mechanic(albeit in town)since buying it and I don't have any of these pissy issues where you fail a WOF for having a bulb blown somewhere. If there's something like that, a new globe gets fitted and voila!...WOF.
Other than being available at weekends, I can't understand why anyone in their right mind would go to a testing station especially if they've read the consistant stream of horror stories on the net about them.