Looking decent, yep...maybe next, some linear VCAs, so that you can use your modulation sources to control CV-type levels. If you're not averse to DIY, there's this new dual VCA from Majella Audio that not only has the usual in/out/CV points, but also a second 'velocity' CV point which can also be used for any sort of secondary modulation signal, making it possible to easily add an extra amplitude modulation layer to CVs (or audio) in addition to the usual one. Spare attenuverters of some sort would be a good idea as well, so you can scale CVs as well as invert things such as envelopes, etc. In both cases, these would play nicely with the whole rig, not merely the Euro cab itself.