Yours is nice. Here is one I made for FEL on my M5700. Use to put up floor I beams , floor decking , posts , etc.
<img src="http://www.tractorbynet.com/forums/files/customization/403829-my-homemade-crane-erecting-timberframe-img_0610_2-jpg"/><img src="http://www.tractorbynet.com/forums/files/customization/403830-my-homemade-crane-erecting-timberframe-img_0635_2-jpg"/><img src="http://www.tractorbynet.com/forums/files/customization/403831-my-homemade-crane-erecting-timberframe-img_0353-jpg"/><img src="http://www.tractorbynet.com/forums/files/customization/403832-my-homemade-crane-erecting-timberframe-img_0354-jpg"/>
I had to design it to tilt to fit under 10 foot high doors to metal polebarn so I could keep it out of the weather when not in use. I may never need it again but it was cheaper than renting or hiring.
Do you know where I can get a pin on to quick attach converter for my L304 front end loader? I've seen them for begged kubota FELs but don't know what will interchange. I need to transplant a bunch of evergreens with a tree spade or tree scoop but they only make them for quick attach front end loaders. I don't want to use 3-pint attachment because I don't want to back up and look over shoulder for every tree to dig.