i'm a long arm quilter- i've done lots of king sized quilts- i've never turned one due to excess weight...on the arm of the machine??? the quilt does not add any weight to the machine- the poles it is rolled on on the frame holds the weight of the quilt- i have turned a quilt to do side borders before- but that was only a directional issue...i don't understand what you are meaning- how can there be weight on the long arm machine? and what (arm?) my machine has handle bars on both ends...they do not come in contact with the quilt at all...maybe a picture would help show the issue you have with the quilt weight (weighing down the machine)