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You may only use one Phase Programmed--Movement per register phase and one Phase Programmed--Gadget per register phase, but there are no other limitations. [Actually, this limitation is not in the rules either, so this ruling represents a change. --JHJ] You could, for example, drop a mine on the first register phase, drop a goo counter on the second register phase, drop another goo counter the third register phase, then drop another mine the fifth register phase. On any of those phases you could also use a Phase Programmed--Movement option (like Crab Legs) but not a second Phase Programmed--Gadget option.