Same here. My HED + on the rear make the Continental 25 rub ever so slightly with the SKS raceblade and damage the sidewall. But I shall possibly go with the pros thinking and put a 23 4Season on there when I change for winter rather then get the new wider raceblades.
On Paris Roubaix they ride wider tyres on front. So if you don't want a new bike built that what I would so.