I have a Tiara II so the size of the throat isn't a problem, but being a sit down I can't do a pantograph easily. I finished Fancy Forest for our grandson in April and really, really, wanted to do a vertical wood grain for quilting. Guiding a long vertical free hand would have been difficult to keep aligned so I resorted to purchasing a pantograph from Urban Elementz. I started out by marking vertical lines the width of the pantograph on the length of the backing, with the first 9" width in the center, and measuring out from either side. The backing was plain enough to be able to trace the pantograph using my light box and Crayola Ultra-Wash fine line markers. When I sandwiched it on our ping pong table it was easy to align the center of the sides on the backing with the center of the sides on the quilt. I then quilted from the BACK to follow my traced lines and here is the result. I am more than happy. It took me 2 days of tracing and 2 days of quilting, but it was worth the effort to achieve the desired look.
The first picture shows my tracing lines before washing, but after quilting on the backing. The second picture shows the finished quilt on our king sized bed. It measures 67" x 91". I had no difficulty removing the traced lines in the washing machine on cold.