The Uniball Signo RT Gel mini Hack

Step 2 Mark the Uniball Signo cartridge for cutting

Next, I opened up the two pens to compare the length of the cartridges, and as you can see, the Uniball Signo is about 1 inch longer, but has room for trimming. I've noticed that new Uniball Signo cartridges have ink at or above the location you need to cut them down without creating a mess. The easiest way to remedy this is by drawing with the cartridge until the ink level drops enough that a slice is reasonable.