Here is a "day and night" photo. Bottom line it's in my garage with and without the flash (8pm).
As you can see the unit doesnt quite sit where the digital readout is perfectly square to my vision BUT it's still readable at a glance while riding. It mounts with a clamp around the fork with a universal ball end. I have seen some of those mounts which could replace the washer unter the triple tree securing nut (and other type mounts) but this one is fine for now. Down side is I have to move my head ALOT to see the temp gauge.
Im not sure what you mean by "how did you work out the speedo with the veypor". Basically its a very small sensor at the end of a wire which picks up a magnet you attach to a sprocket, wheel, rotor, etc. I put the magnet on my rear sprocket and ran the wire through the bike, down to and on the inside of the the swingarm. I used zip ties and caulk to keep the wire put. I went with the rear vs front wheel as it tends to stay on the ground more. If you're refering to calibrtion you follow the instructions; measure tire circumfrence, and input some other data in. Speedo (and tach) are accurate as far as I can tell.
The TT forks work well but tended to feel heavy with the 19" harley wheel. The trail isnt the same as the tt forks are longer (I think 1-3" but you can move them up in the trees to get close to the same geometry as stock). My trail is increased with the HD wheel/TT forks but I dont mind because I'm working it up to put the ford rear end on aka Trike. Ive also considered just getting a mag wheel on the back (the TT rear wheel would look a bit funny because it would have to be flipped (chain on other side) and going back to a bar hopper look. Cruise the twin talk forum (or member albumn) and look for sweatmachine.