OMG... I just realised.. one route will have to pass through Cheadle & Gatley....!!
Whereas the other route would be Timperley, Sharston and straight on to Stockport... bypassing the Cheadle area because of the airport
Using the standard rules of Morning Crescent, Cheadle can only be bypassed by staying on the M60 and flooring the accelerator...
I'm playing Northenden as my next gambit...