My second farkle, and major educational experience, was adding the Zumo on the bike. I tried the handlebar brake mount first but it put the screen to close to read without glasses. So I went out and bought the 660 mount with the Sat antenna mount. This also gave me an excuse to tear off some plastic and look at her naked.....sweet. (Thats some gas tank on this thing!)
Not nearly as bad as some to strip down, but i don't want to make a habit of it.
Anyway, the hole pattern on the Triumph mount is 90 degrees off what the 390 needs, so I would have had to drill new holes. What I chose to do was mount a Ram ball, a short stalk, and another ball on the Zumo mount. Not as clean as the 660, but I kind of like the adjustment options.
I know the 660 series would have been the better choice, but I bought the 390 before I knew I was getting a Trophy. And the 390 has some better options for routing. Tomorrow I'll take her out for a test spin with the GPS.