Only really know the area from macclesfield to castleton, did them in the mk1 last year and it was a blast but ill have a looky on a map and try and figure out where i went lol
I had a bogg brothers kit on my last crossflow and for every day use they were superb. As supplied they were a little lean so needed the jets drilling out, they run very smooth and returned very good mpg.
The only problem I had was over the winter they suffered from freezing which caused the car to stall at tick over and there was little or no fuel at high revs untill the engine bay warmed up.