When creasing parallel lines with Power head or HD Unit, crease line offset may be inconsistent due to play between the crease wheel and the crease wheel holder "fork".
A simple and quick solution may be to reduce play between the fork and crease wheel by applying tape between the teflon glide bearings and the fork.
Care must be taken when you try this solution, not to damage anything. If you don't feel safe and comfortable following these steps, please do not try.
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