Perhaps the top ones are but I was talking about the bottom ones. With rustler a arms and longer shocks the drive shaft will hit. The longer shocks also make the angle of that rear a arm very critical and that caused the stock drive shafts to come apart I had to go to CV joints . you live and...
The extra hole is to give you more drive shaft clearance if you use like extra extra long shocks. you're tuning is done with the adjustable camber that you have. I found this out the hard way