Vector works with Launchpad. Steve Turner has a great video on it:
That is a game changer. Yes, expensive but no more than WMD Metron or Winter Eloquencer with expanders. All modular sequencers are super expensive. You are right, never enough room. I already filled 2 6U cases in first year working modular. Now want another 500HP new case space. Doepfer Monster base plus MDLR 14U case with 1u row of Intellijel tiles will help solve that dilemma for a while :-)