Remove the top of the speaker and the 5 screws or so holding the interiot 1/4 panel in and pull it out a little bit to get a wrench in there to unbolt the single bolt holding the antenna motor on. pry off the cap and the stuff on the outside. install cap and stuff.
i think it is a major improvement. sorry for the dirt, i seriously havent washed it yet this year.
the dx cap works great. just pull the antenna out from inside of the hatch and then on the outside install the gasket and cap, twist it all together from the inside. done.