A drawing pin works well for that ![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
When we're demonstrating really simple stuff we use a couple of limpet shells; they fit inside the cup of the hand just perfectly![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
cheers,
M
When we're demonstrating really simple stuff we use a couple of limpet shells; they fit inside the cup of the hand just perfectly
cheers,
M