Well have used a FS-360 Commercial Grade fitted with a 10" Renegade serated carbide chisel 80 tooth circular tempered blade . It cut through Hawthron Bush's well along with thinning out 1" saplings for our deer camp shooting lanes . I would think BlackBerry would be much less of a task . The big issue is ensuring you avoid kickback situations and have a clear path of clearance from other people or pets . These units do not tolerate mistakes ! The Rhino blades are prone to the same issues unless maintained very sharp . Anyone with chainsaw experience will understand what kickback entails lol.

Trimmers are just a pain to use I guess. I had someone tell me that the back packs are easier to handle. I thought that a good winter project was to make me up a flail mower for the front end loader. Then I couldn't decide on something for the side instead. My tractor is too small for anything heavy duty. The road is paved, but lined w/ bad intentions. In my case lined w/ blackberries! But they are taking over the flats. The trails. Side hills.....

More accidents with Trimmers and Brush cutters than any other piece of equipment I have been involved with . Definitely not for the weak of mind or heart !

So Tom , fill us in . Did you get to make us any Blackberry Jam ?

Even better ! lol.