Dix

I read somewhere about the spools of thread and how they are wound on the spool. If the thread is stack wound you should have it on a vertical spool on the machine. If it is criss cross wound it should come off the horizional spool holder. Makes sense to me, but I wondered if anyone else has tried this.

lindy-2

no idea but as far as i know most cones are criscross wound and none of the machines ive seen have a place to hold those horizontaly.

BellaBoo

Here are facts from thread experts : click thread education: http://www.superiorthreads.com/education/

Jingle

I just use whatever kind I have. It all works great for me.