MX 400 Pro black plastic nut question

[flag8r77]

I only received 6 of the black plastic servo mounting nuts...I assume you need 8 to mount all the 4 servos? What gives? Part number? Anyone else get this from Tower?

[broncomech]

The aileron servo screws directly into the mount tray.
Those plastic nits did not work for me, I used the extra arms removed from the servo horns. They hold much better and once they are started you don't need a wrench or pliers to hold them.