Fuente: WIPO "honey" An agricultural implement has (i) an elongated open channel member; and (ii) a connecting assembly comprising a first vertical connector plate positioned against a first vertical side of the open member and a second vertical connector plate positioned against a second vertical side of the open member. When the open member twists about a longitudinal axis, its upper and lower flanges will move within upper and lower channels about upper and lower raised surface areas. A clamping assembly includes: a first clamping member extending horizontally between the first vertical plate and the second vertical plate positioned over and proximate an upper surface of the upper flange; a second clamping member extending over and proximate a lower surface of the lower flange; and a third clamping member extending (i) over and proximate a lower surface of the lower flange or (ii) over and proximate an upper surface of the upper flange. A support frame has at least one forward central wheeled support unit connected to the support frame, having at least one first middle wheel operable to freely rotate 360 degrees about a first steering axis. At least one forward outward wheeled support unit is also connected to the support frame and generally transversely aligned with and transversely spaced from the central wheeled support unit, and comprises a restricted rotation caster wheel operable to rotate about a second steering axis only in an outward angular direction from a straightforward direction.