I bought my HQ16 from craigslist. It did not come with a bobbin winder. I use Bobs prewound bobbins from Superior and I believe they have on Bottomline. I use Connecting Thread Essential Pro. I quilt for myself and lots for charity. I am totally self taught before there were many videos. I stick with this combo as it works all the time.
https://www.youtube.com/watch?v=Q1mRhcquZTM
This is how I learned to get good tension.