Welcome aboard,
@Midnight. Excellent question, but be ready; you're going to get a million different suggestions because each V rider finds his or her own way toward accessorizing the bike to best fit their needs and riding style. The process is fairly personal, and what works best for one rider might make little to no sense to another. So with that, after eight years on a V, here's some of what I have cooking, with no claims that it's the best way to go for anyone but me:
* A Zefal spy mirror on each side. You'll use the left one the most, but there are times when you'll use the right. Better to have it than wish you did.
* I run four side-mount bottle cages--two under the seat and two behind the head. I use the one or two behind the head 99% of the time because most of my rides are either 60 miles or less, or longer but supported. When I go for longer unsupported rides, I load up all four bottle cages.
* For daytime lights I use a Light & Motion VIS 360 Pro Helmet Light. I went this route for a couple of reasons: first, it puts the light up as high as it will go on a V--the top of the head. Second, it allows me to point the light where I'm looking. I can aim the headlight at a car that has that I'm-going-to-pull-out-in-front-of-you-because-I-didn't-quite-see-you-there vibe going on. Mounting the light up front where the bb is would also work, but I've always wondered how much side-angle visibility is cut off by the feet and crankarms going round and round. Another plus with the VIS 360 is that one battery powers both lights, and a single charge, on flashing mode, lasts quite a while. A bummer for some might be that this is not the most sleek or aero looking approach to daytime lights.
* I do have a bb mounted light that uses the Cruzbike V20c bracket, but I only mount and use that for longer rides like double centuries that might start or end in the dark--something I do about once a year. In that case, the light is more about lighting the way than just being seen.
* I recently became a Varia believer, but struggled to find a good spot to mount the rear radar free of obstruction. I decided to fabricate a small bracket out of 1 inch x .25 inch aluminum bar stock, which I then epoxied to the left-side bottle cage behind the headrest, using super strong J-B Weld. I tapped screw holes into the bracket and attached a plastic Garmin mount (about $10 for a four pack on Amazon) for the radar. Since I already have the helmet-mounted rear light, I went with the smaller, non-lighted radar. But the lighted model would work fine too. There is a small voice in my head that says that the J-B Weld could give way one sunny day, but it is rated for up to 5000 pounds, and I have used it for other applications without a single failure. So far so good, hundreds of miles of lumpy roads and all.
* Bags are super personal. Some people are minimalists, trying to get away with carrying the least amount of stuff (I am one of those), while others prefer to have the space to load up when they want to. There are several threads on the forum about bag/storage options for a variety of riding situations. For me, I carry food on me for longer rides, in jerseys with side or front pockets ("recumbent jerseys"), while a small roadside repair kit is strapped to the main frame, under the seat. My pump rides along between the two headrest bottle cages, on a cage bracket that I fabricated after the bolt on the Cruzbike headrest cage carrier broke--twice.
I hope this helps some. I've added a few pictures, which might clear up some of my descriptions.
Happy riding...
