Awesome build. You have no idea how much you are gonna use this attachment.
It makes a very lazy man outta ya though. So be prepared for that. I'll work a minute or two trying to pick up a small branch with the Grapple rather than get off and pick it up by hand!!!
If a person is gonna take the time to build a Grapple, you definitely want to build with two "jaws". As James said, it increases productivity dramatically. Even with Brush, it will pick up a bigger load. And most importantly, it will not drop brush all the way to the pile.
I've built a LOT of attachments and add-ons. None have a payback like a Grapple.
Again, great build!!!! You do quality work and should get many, many years use from this gear.