Well, max-power works here and produces nice results... but the problem is that one source could have a completely different orientation in each of the time-frequency windows if we allow max-power. Of course it can still have if we do None, but to me if you use free orientation you're not really interested in orientation? Dalal says they enforce the same orientation between the active and control data, but I'm not sure if they do for all the t-f windows, but that would seem the proper thing to do. So I think supporting max-power done properly should enforce same orientations and that's not so easy to do.

So, I'll write the check for pick_ori - forgot about this!