I bought a used machine from Nolting and they were really good when I needed help. Even with a long arm there is a learning curve are you moving the machine yourself?? If so you are the stitch regulator you have to learn to move with the machine and the speed of the machine. Yes you will need to adjust the tension that is why they put the tension thing on the machine different thread different batting different fabric all makes a difference. Just like on a domestic machine you don't sew silk the same way you sew cotton. You need to practice and get to know your machine.