so you could probably still do it, just with more spacing between the caps...if healy is supposed to be 4 or 5 inches separation or so (the width of your head), make the LD's 7 or 8...would that work?
See, I don't think you can run the Healy Method with LD's. It is not really the Healy Method anymore, because you have two diaphragms on the LD capsule. When LD's are run in omni, technically it doesn't matter if they are running 90º to the sound source or aiming directly at it because with two diaphragm's, there is no real "aiming" of an LD when in omni. It's non-directional in that pattern.
When using the SD's though, you eliminate this problem when running them at 90º to the sound source, back to back aiming away from each other due to the lack of the rear diaphragm. This creates the spacing and time difference.
This is just my thoughts on all of this...