Thought I was through with the machine, but my brain always likes a puzzle. So I got adventurous and opened up the top of the machine, following the instructions provided by the gentleman on the other website (generations). I adjusted the thumb screw to increase the tension about 1/2 a turn, and put things back together. Just finished testing the new tension. Still need the feed dogs up, but the top thread is no longer peeking through the bottom. Will need more testing and adjustment to make sure this wasn't just a lucky test. Will let you know.
By the way. If you follow the gentleman's instructions, it is actually very easy. I was expecting a complex mechanism, and it is just a big thick spring with a rod through it, and a few end caps to hold things sandwiched. Know it is more complex than that overall, but the part to adjust is simple, and anyone can do it, if I can.