Don't know if I'm missing something but why don't you just develop the film on normal reels. It should easily fit on 3 reels. The only down side I see is when you cut the film (twice) you may ruin 2 shots. You might be able to shoot 36 shots (the amount that should fit on one reel) then fire off 3 or so blank frames so when the reel is full you most likely would be cutting on the blank frames. Do the same after the next 36 and fit the last 18 or so on the 3rd reel.