Quick-change Paper Towel Longer Flapper for shorter rolls

I'm very happy with the original design and mounted it on the inside of a cabinet door in the kitchen. Unfortunately there seems to be shorter paper towel rolls available which will not hold without changing the wall mounts. 

So I quickly extended the lenght of the flapper to allow the “normal” and the shorter paper towel rolls.

I only changed the L flapper and mirrored it in the slicer. But this is also not really required if you don't mind seeing one flapper with the top and the other with the bottom layer.