My L555 has the original mounting plate. I realize that is unique to NH/JD but when I look at other attachments it seem like the top of the mount is similar "^" kind of top, but doesn't have the 2 double "L" on the bottom the the lever locks onto. My question is, are there other types (companies) attachments, that I can buy and weld on these "L" brackets? Has anyone tried this? or am I barking the wrong direction.. I realize they make converter plates, but I am trying to avoid paying a grand for that, because my machine is on the old side and I just want to buy 1 attachment.