Very nice job. I like the quick hitch mount.
A few ideas to consider:
You could always add the top works for protection. The one I made bolts on. You could bolt to the channel.
I added some pins to mine so I could back up to my Speeco quick hitch and use the forks behind the tractor. The 3pt has a much heavier lift capacity which I use when carrying a 300 gallon tote of water. They probably would fit inside your Bobtatch so your would also work front or back.
Consider a chain hook on each side, near the top. Mine are used much more that I ever expected to.