If you take a look at the bottom of your RS, it says 65mm to Antenna Refrence Point (ARP), then you have the adapter that is 21,5mm.
So 86,5mm from bottom adapter to ARP
If you take a look at the bottom of your RS, it says 65mm to Antenna Refrence Point (ARP), then you have the adapter that is 21,5mm.
So 86,5mm from bottom adapter to ARP