So I have this perfectly great GPS mount that also has a Go Pro underside which can support a headlight with a Go Pro mount. I ordered it with the Garmin 830 not realizing that the Garmin shipped with it's own slick mount.
So what I think I'm going to do, is strip the Cateye and crap cheapies lights off the Tarmac, put the Go Pro/Garmin mount on it, and turn it in to a capable night riding bike, with a 10,000 lumen front light and decent rear flashers. I don't do a lot of night riding, so I plan on keeping my Cervelo clean, and packing the lights on the Tarmac. I can use the Garmin 830 on both. It's a win-win situation. There are a lot of night hazards on the road that can't necessarily be seen even with good lighting, and I don't have to worry about trashing a good set of wheels.
It would certainly encourage me to ride the Tarmac more. Not that it hasn't fulfilled its role. It has 34K miles on it and it is still going strong. One thing I realized is that after all that time, the drop bar was angled way low. I rotated it up more like my Cervelo is. It might transform it in to a better rideable bike.