Updating the classification sheets; subscriptions New tools can be integrated into the system by supplemental overlays of different sizes. On these partial foils there are - beside the new tools - always illustrations of parts of already existing neighboring tools. These serve as help to find your way when sticking the supplemental overlays on in the right places. Older tools having become redundant may also be removed from the system by sticking new tools onto those places. In addition you may also change your tool-storage system individually with so-called neutral toolboard overlays. These overlays are uni-colored, and have no other imprint. You may use your scissors to cut out parts of the film, and stick them on to cover individual not required tool illustrations. Thereby they have optically disappeared, and will no longer disturb the control for missing parts. If required additional tools may be produced from the neutral overlays in different colors as silhouettes - and integrated into the system. (Attention: when doing so, please also update the legend!)