Just bought a used McKay stitcher. Pearson Model A. Working great when we bought it. Things shifted in the move and the needle broke right after setting up the machine. Changed the needle and now the stitcher is picking up the second stitch as it moves to the next stitch and hanging on to the second stitch causing the machine to jam up. Not sure where/how to make adjustments to correct this. The needle height? The tension? Both? Does anyone have experience with one of these stitchers an