Jonathan,
Please, please make a note to make sure the pointed roof overhangs are corrected on the F-3's , especially the "B" units, as they were incorrect on both the FT's an F-7's for most roads. Understand the reasoning behind going with the phase IV, as the most major change from the F7 shell would be chicken wire instead of stainless farr grills. Early phases with full chicken wire down over the portholes would be great if possible.
BH