Same as the guys said, hence the panel solution:
First, place these 2 images in your "/Images" folder => images.zip
HiseSnippet 1118.3ocsV0uaaaCDmxIZqVctnEXO.D9elLPlgcVa2.F5VVbbR8Z9vHNqcEAEFzRz1DQhTfhtoFAAXOZ6IXOK6MX6HojkbpSVhAlPBfuu+cGu6H6KEAzzTgD4T8r4ITjyW4NXNWMsyTBii5sGx4ItGQRUTI1xZ24IjzTZHxwYiCzLbptIx782+7tjHBOfVvBgdqfEPOjEyTEb6uyaXQQ6SBomwhKo8y2oWff2QDIlA3YC2VnDRvEjIziIZ0p3hb9htgLkPNPQTzTPmcEgyGLUbI2p+aYorQQTMQaz.vQV1nNSYQg8yy0TDxYy9EY9F1L+qcOhExVvunB7Ti.bgEkqANUVFRatDjZeaPZeQTn1A2B7bJAuMsv6YtCBjrDUgDM1draONb3Ll.k8xvxpKpxesgaGAnAW0LlbAceIPrvB+W1p0V3WzpUierlGnVpHh1LHhRj9ZN07fiiTE9iDItOgSiZieEN2aSnpNh3DAGH7qaEW2ZkknYjfD1KFN97qeU+SO4W614rg6exg608zq6M7MbwkMS3SpuEF9p26nCrV+ea66lJF9Z5PVZl4Za2t9MwKKdhtqIE+pysNOWwOXTzpB3+yDGBgBxq50ugGRoQz.0tJN3C74qNs2clRI3.x2plG9V9tKKAbawysadMOFOhwo3wy3AJlfiADt.ZZmKEQ9A4ddK.6QynMp4cE15T1Xruk2UEQolWUirkJA40ryK7eSFOj9oSFWD.CfMFmcTIoIvfhxzwnYecMuqgeNVHw9ivLdoBYC7nlo5xfAzcHQQifAb+UjPMxpJKZH.y5qCyohYJnZ3mWM7mzv6JupSZFJIWZ6XJkTagOGZvg+TSg9E3D3crP0T+FELdMkMYJ.9OXTCFD7tF9uTs9XghdB22DEuq8v2Tz3wqTVVdDQkqTrdwm7tLzmOKdDUleblqHrMX40MO99stIv1DVRQAuGmoNIglQWrPRKyl04RagVjrkYUjik4ZRsUnVAqOeeGJaHA17UIScPUkYu2Sx16YmXPL.iUcyF7PlpS4qfPO.y2N2bWGi0+Vu8HJhd6aFb.HlPkJltP6rG8ivUY1cwUc2ildgRj.gYwPMb6jMj0x2TqacMQ7Qt11XzmVf0+LXm4EDuemK0clELj6L0zYVlCpTn9x6QwoHX+w3RAC8S4Ay0gCj4Ax04a.JIIjINPJlkX6EdXAc6RA8op0One90evkvhvYQD0x2LqeBRl.X9Yoq.0WywSYp4k6Od.WW2ZkWW2dUsu2S39L29LUvzUi2Jq.u54g+mwa1iep41c7XXGbAX2zc+eeceoyC.J1E5SNhnjLn2w83YwCf2+EPAjvgYlTcORE8JBKcq7w0ATdng3efuLgs0zNYBamKDESBjhgA1MC5mW8HCG.SbyKKqBOwEnwK1m351pYKTL7pugAA5Rw2BXe01r8ZXy2sF1770vlWrF17x0vlueMr4GtSazO39WloDw1wDfQ+tlkyNNc4DnKyzQh9Wv6LwYO
Of course, you can use filmstrips for knob/meter design...