On many factory ballast systems equipped with soft bags, the fittings are actually cemented into the bag during construction so they won't pull out prematurely. That's great if you want the fitting in the bag, but what if you need to change the fitting to a different type or system? We already posted step-by-step instructions on how to remove fittings that have been cemented in place, but figured a video is better than pictures.

So here's a brief video that shows the process: