Wait. Something may’ve changed because my recollection was Dynamic Attribute Set DMT template wasn’t present without AUOM previously, yet you have it, correct? Do you happen to have Configurator license?
I find it silly DMT templates are hidden when the tables work out of the box the way you want to do this. Maybe that has changed for the better and maybe there’s another way around your CalcType error (?)
Still tho, pasting into AttrSet Maintenace from a properly formated (dowloaded from that grid after all attribute columns are first displayed) excel sheet might be your best bet if this is a one-time deal. You could then download from the grid again to get the AttrSetIDs for your Part DMT.
Ps - assumes Kinetic - I have no idea if export to excel > paste as new is a thing in classic.