Im doing the thread exactly like in your first picture. And Im using a 22 needle. Ive tried every combination of tension adjustments, but I just cant get it to consistently sew 138 nice with no problems.
Its frustrating because Ill sew one thing nice with 138 and then start on another thing and it sews terrible. Cant figure it out. I just had my machine serviced a little while ago, so it shouldnt be any problems with it. But like I said, 92 and smaller sews perfect.
I think Ill just start saving for a machine that can do the bigger stuff with no problems. Any suggestions.