Anyone have a part number and pics for replacing the linear bearings on the Roland SP-300? I cant see them but my print head assembly keeps making occasional grinding/scuffing noises and hanging up in spots on the carriage causing a "080" code. (I think thats the code, anyway)... I have tried cleaning the rail and applying 3 in 1 oil as well as light grease and have gotten away with it for months. I think the time has come to replace the bearings but I have no idea where they are or what they look like. I have the service manual that I downloaded from this forum but there is nothing I can see about the linear bearings or their replacement. Thanks in advance for your help, you guys always come through for me so I am hoping