Looking good, John. If youre wantin to use the end of the feather then don't split the quill. Instead use a sharp knife and cut off the feather on one side. That will give you more spine to work with.
I agree that will look good on those shafts, but I think 2 fletch will probably fly equally well. Since you have already put the work into bare shaft tuning, fletch is mostly just asthetic at this point (plus a decelerant to a small degree.)
Scott