Whether gas or battery operated string trimmer heads have become a real head ache for us. We've used the Stihl cartridge's on a battery operated trimmer until the trimmer broke and was too expensive to replace. while they were coinvent they were expensive. I'm looking seriously at a DeWalt 60 volt Flex battery trimmer because we have other 20 volt DeWalt tools and it would fit into our system nicely. I'm concerned about the head. This looks interesting: https://www.homedepot.com/p/Rino-Tuf...7093/206470721 I'd have to verify it would fit of course. I'm wondering what you're experiences and recommendations are regarding string trimmer heads, battery or gas units.