I made one about 35 years ago of similar fashion, mine was done with square tubing and attached it to a partial sheet of plywood, one arm had a rod welded to it so you could wind and unwind the spool and the whole thing could be tossed into a pickup bed or a skid steer bucket. Absolutely essential to handle high tensile fence wire with. Over the years I've had to replace the plywood base several times, but the metal is like new yet. You did a great job of fabricating and thanks for sharing the photo with us.