I’m so sorry to hear you are having issues with your new machine. I bought a Kwonglam from Peter last year and have been very happy with my machine. He’s known to be a standup guy and has been very helpful. He offered to set up some days so I could come up and make bags on the different machines before I purchased one. He had the Juki in stock when I was there and honestly after I played with it I didn’t like it. It has a tiny throat space and didn’t seem to have the power that I thought it would. I completely understand the issues of running it back and forth. Commercial grade machines are not designed to move. The head on mine weighs around 90 pounds and was a bear for my husband (who is 70) to get in my basement sewing room. I hope you can get the issue solved to your satisfaction.