Babylock BL4-428 Serger Upper movable blade broke and a local repairman said the lower blade is off by 1/8 inch and cannot be adjusted. Sound correct? Not a babylock dealer. An old machine but don't really have the money for a new one when only use it occasionally and for serging seams after sewing them, even though I'm sure it does lots more.

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I think I would get another opinion. Sometimes you run across lazy technicians or those who would like to talk you into buying a new machine. Of course, if your machine is older, it could be difficult to locate replacement parts, but getting that info from another technician will confirm the first opinion.
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