I have a 2016 Road Glide Ultra and I am going to put the Forbidden FLY bars on with the BungKing 14 inch riser. I have read a million different things about extending wires/cables and I was looking for someone that knows for a fact with a setup like this. Some say "as long as the risers are 15 inches or lower that it is not needed." At the same time I've seen people saying 12 inches are tight. Anyone have a for sure answer?