Thought I'd chime in after using my grapple for a couple of months on my 445. In a nutshell, this thing is a beast. I got it to complete a property clean-up task at our new mostly-wooded place. Primary job is toting trees and brush from some places inaccessible to pickup trucks/trailers.
Grapple was simple to install, it's easy to change from blade to grapple, and it'll pick up stuff I have no business even trying to pick up. See photo below.
A side benefit is that it makes a nice 'rake' to spread out topsoil, move leaves, etc. I did some stump grinding this past weekend, and used the closed/lowered grapple to smooth over the ground-out holes.
Ended up putting together a makeshift weight box for the back, as traction is more of a limiting factor than lifting power.
And Mark at Innovative TA was a pleasure to work with, too.
"Chip"