We will gain experience in hybrid detector operation and data analysis, even while one telescope or the other is being completed, upgraded, or repaired. Half of the hybrid aperture will be available with each prototype telescope. I have communicated with some members of the fluorescence group about this matter. All comments received so far are in favor of the suggestion to shift the engineering array. I know that Ingo Allekotte, Ken Gibbs, and Brian Fick are planning to work on a final survey for the engineering array starting next week.
Time is short.
I am therefore submitting this proposal to you for consideration by the project leadership and full collaboration without first waiting for possible objections from within the FD group.