I use a Joye 510 PV and have been using atty's with it (them) but am looking into switching to carto's and have a question. It seems silly to me, but I can't find any info on it. My question is...do I have to use a drip tip with the carto or can I use an empty cartridge that I use with the atty's? I don't really like the look of the drip tips and not sure I would like them. I use a flat end cartridge for use with my atty's, not the round ones, because and don't like the round shape. Any help would be greatly appreciated. Thanks!