SD-786's were relatively unknown; their extravagant pricetags meant that only the highest echelons in society could afford them. They were each cutsom-made, with no two being alike in appearance or personality. Only 300 units were known to exist, with over 200 of these serving Emperor Palpatine. They were known to be used on the worlds of Coruscant, Cato Neimoidia, Hespiridium, Muunilinst, Scipio, Vjun, Tapani, Hapes, Serenno, and Naboo.