A very interesting proposal.
Having had a look at the political make up of the area included in that map, according to the councillors serving the eight wards (four in Hyde, and four in the Bredbury, Woodley, Romiley and Marple areas of Stockport), I've added up the councillors elected from each of the parties as follows:
Labour 10 (all in Hyde)
Lib Dem 7 (all in Marple/ Romiley)
Tory 6 (2 in Hyde, 4 in Marple and Romiley)
Residents 1 (Bredbury Green and Romiley ward)
TOTAL 24
Doesn't look much like a Tory seat any more, does it..........