IQ stands for Intelligence Quotient, which is a percentile. An IQ of 100 represents average intelligence considering all humans, everywhere. So an IQ of 100 is typical intelligence. IQ of 70 (70% of normal) is borderline retardation, whereas 140 (140% of normal) is borderline genius (or actual genius, depending on who you ask).
There is no top end to the IQ scale, but there is a bottom (i.e. 0=braindead). So someone could theoretically have an IQ of 300 (300% of normal).
I would have addon RC systems stack with BOD RC from vehicles. This will ensure that mounted vehicle weapon systems will always (or almost always) be more stable than footsloggers.