Not sure what you mean as well? My neighbor cut and baled a field for me a few days ago. He round baled some and square bales some for me. He came by today to pick up his round bales with a homemade wagon. Not having a loader, he used a 3pt bale spear. I stood by the home built wagon while he ran back and forth. After it was all said and done, we stopped to chat.
His wagon, which he had not built was to high. He had to park it in a swale to load it. Just one of those situations where you home build something but would do it differently the next time I guess. He also said that this wagon was not wide enough for his baler that makes 5 1/2 foot wide rolls. I suggested adjustable cross members where you could pull a pin and slide out your crossmembers to accomadate two wide bales.
Nothing like a experiance and a good imagination to home build a better rig.