Well I have learned a little about older EZ loader trailers.  If anyone has a tandem axle 2001 or older this might be some useful info. EZ Loader used a mono leaf system on these older trailers until they realized that was not enough to support the weight. They do not sell the mono leaf any longer and so the only option if one breaks is to replace all 4 wheels with 3 or 4 leaf springs instead of the mono. I'm sure I could probably find a mono that was close enough to the original if I looked really hard. However,  knowing the manufacturer mad a mistake by building it this way makes me really nervous and so I think the upgrade is the way to go. Oh and changing these out with hand tools is no fun at all.