`Small is beautiful` is the title of a famous book of E.F. Schumacher [1] the
subtitle `a study of economics as if people mattered`. Likewise in physics the
individualities of atoms or molecules and the dynamics of the interactions
between them as well as with the outside world, come the more into focus, the
more constrictions are released. In a solid these are the spatial periodicity
of the lattice structure and its related binding, released by forming clusters
of a small number of molecules or atoms. Likewise on this island we may have
felt more excited being a small cluster of people with outdoor activities
related to its finite area: its shape and its surfaces ( beaches ). Thus
whereas in scattering of molecules on one hand, and studying the intermolecular
binding in a solid, each molecule can be treated as alike to the others, this
is not so in a cluster with its rich variety of number ( including zero ) of
concerting neighbours for a `bond`. Similarly with the small number of
participants we had ample time to learn and discuss the  different concepts and
results of each other. In respecting and honouring them all, and their
excellent professionality, I will restrict myself in this text to some few
remarks, hommageing some related older but original and partly unpublished work
of former collaborators of our group, H. Gräf and R. Boendgen.