I have the 4500D. Remember that information was probably required by the lawyers to be printed on the pages. Of course if you set up the machine wrong you MIGHT get hurt or damage your machine. Also your might NOT. Follow the directions carefully. Eyeball the setup when you get through. If it looks right then it probably is. If the machine sounds right when it runs, the you probably did it right. After a few times you will feel confident. Do you have any specific questions? I'll try to answer them if I can - probably on Sunday night. If you can use the small hoop, you can use the medium and large hoop. They are larger but not different. What other attachments do you have?