>>2945254I'd use the tape from the end of the first roll, stuck onto the start of the second.
Whatever you suggested sounds like more work for no reason.
But again, ideally I'd just put the second roll in after, I was merely asking if anyone tried this and could tell me if it was easy to tell or not when they hit each other.
I have a tank big enough for two 120 reels, but if I could do 4 at a time and save chemicals in the process I don't see a reason not to.