Hi guys I just got my first tank in the mail a 3ml J tank. Before I filled it I decided to do a dry run and see how the carto fits through the holes in the tank but here's the thing. It wont go through, either side. I tried forcing it to no avail, used juice to lubricated it a little. No go. It shouldn't be this hard to put the carto in. Only way I could get the carto through the hole would be maybe taking a hammer to it. Not such a good idea haha. I'm contimplating sending it back for a refund. Oh and I'm using the boge 3.0 cartos they prepunch.