The eccentrics for the Laydown are the same part as for the KC, U7068, for clarity's sake.
Shimming and eliminating play are a normal part of car prep. I shim the steering and hub carriers on the cougar, the diffs have shims in them..etc.
If the eccentrics were a press-fit into the gearbox some would come out too tight (unavoidable tolerance differences in manufacturing injection moulded parts?). It took all of about 2 mins to eliminate the movement on mine. Not a big deal. I'd rather shim and pack them so there's no rubbing to cause wear and develop slop. To get that type of fit without taking that step may not be achievable without machined parts, and even then tolerances exist in manufacturing as tools wear etc.
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