So far as the Deities are concerned, this has been discussed many times, so just do it nicely using your best judgment to make Them like the Deities which are there in N.Y. with you as far as possible. Your idea of placing conchshell in the eyes is nice and you may do it. You have the perfect example of the Deities in New York, so if you can similarly make some Deities for our other centers it will be very nice accomplishment.
Also, you have asked about construction plans in New Vrindaban, and these questions may be referred to and discussed with Hayagriva and Kirtanananda.