Yeah a 30 ml syringe will probably fill about 40 cartridges. LOLThat's what I'll do. My Preppy is a 03 nib. This reminds me I need to get a smaller syringe for these pens, I used a 30ml syringe I had for mixing Bootleggers Aftershave mixes to load my LAMY converter yesterday. It filled the converter very quickly. I'll source a 3ml syringe for more precision.