Harry
Kin is right to give you a health warning. I spend a lot of time in Mid/North Wales, when it comes to mobile speed cameras the police are 'zealots' beware any village you enter that has a bend at the entrance and a 30 MPH sign, lots of mobile cameras, very few fixed ones.

If you want some real driving get off the main roads and take the longer but much quieter, and fantastic, side roads.

If you get the chance try the Elan valley , all the car mags use it

Where are you staying? I may be out in the Roadster this weekend in mid Wales
Andy