the octaperra droid or "Tri droid" was used widley by the CIS usualy seen on industrialized worlds where fighting is urban taking place on streets and more cramped areas like bridges or hangers. the most effective part of the tri-droid is when it's destoyed sometimes, viruses that target clone troopers contained in the dome kill all the clone troops in the vicinity.
zoom of the dome and sorry for the holes but it's somthing I have to aceppt
what was really lucky about the leg scenario is that the droideka leg thing fit perfectly.
there it is early on in the battle of Christophilis during the rainy season (hence the clone trooper's poncho).the whole thing took me eight hours to build mainly on getting that darn dome right. I mean at first I tried the small radar dish then the middle size radar dish until finally it worked for the large radar dish, than I had to find out how to get them all together. It was Considerebly easier to make the legs.