To be quite honest you aren't "grounding" your snake to his tank. Handling really does nothing for your snake, it's only for your enjoyment. While there is nothing wrong with holding him, snakes are solitary animals and could truly go their entire lives with out being handled. Now to handling after feeding, I would recommend waiting at least 24 hours, longer is better. Please don't take my post the wrong way, I just don't want you to think you are doing your snake an injustice by leaving him in his tank.