When I loaded your blueprint in ssp creative mode, the welder and crane groups were missing; thus the hotbar settings didn't work.

ok

Those modules are being designed to work together with this grid: http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=612356651 and its cargo variant, the CV-60.

Sorry for the lack of information so far, I'm still working on it. That grid is being designed to build the MV-60 and CV-60 cargo and utility modules on survival mode, like this one: http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=624248235

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