Why is there only a BDup1_x1Inst and none of the '2' variants implemented ? You could indeed pass a LongType as one of the arguments, but I can't find how to duplicate 2 Ints. Btw, for me it is very inconvenient that you have to know the exact type of the slots you are duplicating. Why can't they use the WordType and the DoubleWordType of baf ? Any ideas ? Thanks, T