I bought a Rollo label printer and it's awesome. The only problem I had with it, was that it does not "support" printing labels with a paper width less than 4cm (1.57″). I solved this problem by printing some arm extension clamps so that it can guide smaller paper rolls fairly straight.
EDIT: Use version 2 for a straightening guide :)
The author marked this model as their own original creation. Imported from Thingiverse.