Sometimes you have to give up a few mm of build envelope to make a nonstandard extruder fit. I doubt you can print anywhere near the edge of the build plate anyway, so you aren't really giving up anything.
I use a BullDog XL and it has been absolutely reliable for the last 8 months (printing ABS only). I haven't had to clear a single jam from it or the hot-end (E3D v6).
Ultra MegaMax Dominator 3D printer: [
drmrehorst.blogspot.com]