I have just purchased one of these https://www.pk-pro.de/Miniature-Holders-Grips-V3 to help my shaky hands. I haven't used it painting yet, but others have said they are excellent, and my first impression "dry handling" with a figure in it is that they look the real deal. Light, and very nice in the hand.
Videos of them are here
and here
Videos of them are here
and here