After running it for a few hours I made a couple of little changes then shot some paint and wired up the electric start.
So some photos of the end result, the last time it will be clean.
It does, cut 19" and loop it around a link of chain, welded to the hub. The two I have use two strings but I welded 4 links to this one (only used two of them) to the head to see how it worked.
I have a video of it in action but its too large. This is an example of how far it will cut under an object, as you drive by.
I really wanted it on the front but it was less work to make it attach to the other things we have via 2" ball vs custom mounts on everything.