Anybody out there successfully fit a pair of the new HED Stinger 6's in a Felt TT frame?

On my B12, the stock brakes will not open wide enough to allow the wheel to go in the dropouts. Up front, it looks like I can swap calipers or do a small modification to the existing caliper to get them to open enough, but in back the part of the brake that goes up to the cable will contact the seat tube long before the brake will open enough to get the wheel in place.

-Zach