
I received the ink today. I watched a few YouTube videos and felt comfortable refilling almost empty cartridges. I tried a hand drill but gave up very quickly as I have three battery powered drills. I found the right size drill bit and it was very easy to drill through the plastic with the drill bits. I'm not sure if you have a drill, why would you have to do it by hand. I've filled both black and color MG3620 Canon 240 and 241 cartridges and both have worked great. My first test prints weren't very good so I did a deep clean and both color and black were great. I really think that with all the ink I have left over from this order I will save a lot of money. I am very satisfied as I looked like it would cost me a fortune to buy cartridges for so many prints. Try them and I think you'll be as happy as I am. jackUpdate: 04/16/2020This ink is fantastic. Original cartridges are empty quickly. Watch some YouTube videos and you will see how easy it is to fund them. The $$$ savings are incredible. Use a drill and don't hand drill holes, I don't know why anyone would do that if they have a drill.

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