Do you have specific dates for their proposed use?
No, I am aware they were uased by the Venetians in Dalmatia agasint the Turks, and in Istria against (and occassionally for) the Imperalists in the late 15th century though to the early 17th century, and eventually passed over to Imperialist control in the later 17th century. I came across the reference as part of helping my wife with a Dalmatian geneological search and then found a few articles on them and their later permutation the grenz (search under Gunther Rothenburg for the articles).
I did not find any specific reference for thier use in Italy by the Venetians, but always being on the look out for troops with a little "character" wondered if anyone had heard of their use in the Italian wars.
Little early for the use of "commanded shot" but a couple units mixed in with some Stradiots would make a colourful flank guard for the serene republics army.