So, here’s what I found. I discovered a very affordable and user-friendly electronic device that, when combined with the magic wand massager and the male attachment, can produce some excellent (painful?) edging sessions. It stands out because it is hands-free, allowing you to be tied up while using it.
Here is the item: an outlet timer. Its operation involves setting specific times for it to switch power on or off to any device plugged into it. The feature we care about most is the cycle timer. Essentially, you program it to stay on for x seconds and then off for y seconds, repeating this pattern until you manually turn it off.
In practice, I set up the massager to vibrate for 8-9 seconds, pushing me right to the edge, followed by a 30-second rest period to let things cool down. Your timing might vary since everyone is different, so feel free to experiment. My method involved setting everything up and securing my cuff before having my girlfriend come over later to unlock it.