To get the lineup for the jackets where you hoop 'inside' the lining-lay the jacket flat on a table and use seamstress chalk to mark your center and perpendicular lines (only a small 'tic' is enough) out near where the edge of the hoop will end up. Use the same point on the sleeve seam, measure up from the bottom hem, any place that is going to give you a 'straight' or consistant measurement on every jacket. Jackets with the 'yoke' shoulder pads are easy to line up to, but the yoke is hard to hoop over and usually your embroidery ends up right under the yoke. Experiment with how you can get the hoop to work. We take 'adhesive' backing and cut 1" wide strips and then wrap it around both sections of the hoop (like a candy cane). This gives the hoop a 'texture' that will grab the hard to hold fabrics so the hoop doesn't pop off. With the larger hoops we also use the 'wedge' type of paper clamps-just do a trace before sewing to make sure the wedge doesn't hit the needle bar and pop off. On your hoop (top piece) mark off perpendicular marks for top and sides in the centers. Now you can line up any jacket easily-just line up the chalk and marks on the top hoop-and reach up inside to move the other hoop to the right spot. A little practice and it works great.