Just a tech related question to this...
When ordering the Firering cable do we need the cable with the K4R stud (K4R18) or is just the cable (K-8R18) used?
I'm not seeing where the K4R stud is used on the WagonGear writeup, so I'm guessing I'm good with the cable alone (K-8R18).
You will need the K4 mounting stud. The insulating washers from that kit will be used with the cable. The coupling will be used top side to mount the antenna to the long rod coming out of the top of the fender.