^ & ^^ feel free to PM or start a new "OCD" topic...
Well, I've got the solution. I needed to put on a new roll the other day and, in the interests of solving this major issue (and not because I'm completely lazy) I didn't take the old tube off, I just placed the new roll on top.
What you can do there is have the paper coming from the rear and then looping in front of the old tube. Or you can have it coming from the front and looping behind. It does both front and rear feed in the same simple mechanism. Problem solved! I should have become a behavioural scientist
Whilst looking for images to support my elegant solution, I found this, which rights all the wrongs in the world:
Just think how much happier everyone would be having their toilet paper handed to them by Sir Bog of Roll?