Hello, I just got my first industrial sewing machine, a consew 206rb-5. Im using #69 nylon thread and 135x16 needles. I just got my tension to where my stiches are balanced but the needle tension is so tight that I can't pull the top thead without first pulling some slack after the spool pin scew. The spool pin screw is the source of the super tightness. I've never had to tighten the tension on machine this much before and im worried I'm doing it wrong/gonna hurt her parts some how. Can someone reassure me that this is correct or point me in the right direction of how tight the tension should be?