I've found a good list of exercises to do to strengthen the serratus anterior which will help in scapula stability, which is something I lack to a fairly substantial degree. Unfortunately, most of these exercises (woodchoppers, pullovers, cable crunches, etc) require a cable machine in order to get meet resistence on the necessary plane of motion. Are there any variations of these exercises or other ones that will allow me to strengthen the serratus anterior with freeweights (dumbell, barbell, calisthenics)? This problem has been bothering me for years and until this point I've been focusing too much on lower-trap strengthening and not enough of this. Now my shoulders are starting to go bad because of their limitations due to bad scapula placement/stability, which is something nobody wants. Thanks for any suggestions/help.