The one time I had "hands-on" experience working with someone who used a platform, the mare moved, the stallion fell off, flipped over, and landed on his head.
The best way is AI! Teach the stallion to breed a dummy and collect him yourself, then just put the whole ejaculate right in the mare. You don't need high tech when you are doing it right there on the farm. Its a lot safer too, and easy to learn.