I think the Surface 3 may be under-powered with its Intel Atom processor to run C1 Pro 8 effectively. Confusing naming conventions if you ask me. Surface Pro versions run Intel Core i5 and i7 processors which work great for tethering with C1 Pro 8.
I'm sorta torn between larger screen versions SP2 10" versus SP4 12" and possibly 14" screens---for size/weight/portability. Btw, Paul just confirmed the new light hiker clamp does work on the SP3 also, but really doubtful it could handle 14"!