Using your ball transfer platform is easy. First, find a suitable platform like a hydraulic or mechanical post table or a lift table. Then, bolt the ball transfer platform unit onto it firmly. When you need to transfer items, simply place them on the platform, and the chrome ball transfers will make the movement smooth with minimal effort. As for maintenance, keep the platform clean and free from dirt and debris regularly. You can use a soft cloth to wipe it down. Also, check the bolts periodically to make sure they are tight. Remember, all the measurements provided are approximate, so there might be slight variations. If you're interested in the retractable stops, reach out to your sales representative. And always be aware that weights shown are just for shipping purposes, so don't base your load - planning strictly on those numbers.