Thanks Ben,
Good to know of your experience, and I do wish I had the MK21 capsules, I would like to try my 2 x MK2S as a spaced pair but that would depend on the PA levels in the hall, also I think they may bring out a little too much HF content so perhaps I will try having the koto off axis for a more natural sound. I will probably end up using a Sound Devices 744 and an MK4 or MK41 pair as well as the spaced omnis and see what works.
Thanks for all the comments slutz