Thank you so much.. reviewing all this wonderful information.
PS he uses his right hand. We cannot clamp any controller down so to speak.
We are actually in the process of getting an arm to mount/lock the gaming laptop on, because nursing staff will not bring him his laptop. (I'd like to see them go a day without their computer). There is no surface to clamp anything more onto, and even if there were, it is better for him to use it by his side instead reaching out in front of him. If it is mouse style, may require a stiff pad to lay that to his side?