Fein vs Harbor Freight Blades

Harbor Freight sells a multi-purpose tool, according to the label made by Chicago Electric they also carry an assortment of accessory blades which fit their tool. I have an early model Fein multi purpose tool which accepts Fein blades that have an 8 pointed star mount. Naturally the HF's are priced quite a bit less than the Fein's.
Has anyone had any luck mounting the HF's on the early model Fein?
Joe G
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