Hi,
I think you'll need a clock generator, either a PAM or, for now, an LFO.
Regarding the case, as a next step, before buying another case, it might be more logical to return the Behringer semi-modular components to their respective cases...
-- ferran_RMBL
I do have the four LFO but I do find it somewhat limited. Seemes Like PAM might be the next module to get. And I suppose your right about returning the Model D and Neutron to their own cases before getting a second GO case haha