Husqvarna Viking Designer I II, QD I II Thread Tension Unit 412600502 Brand New

Husqvarna Viking Designer I II, QD I II Thread Tension Unit This is a Brand New Tension Unit to work with the Designer I II, QD I II  Sewing Machine. Part# 412600502         Due to the sensitivity of these boards, There is absolutely no return and should be installed by a trained tech:                 "PLEASE READ BEFORE ORDERING--THERE IS NO RETURN OR REFUND ON THIS PCBD."