Some of the retroreflective tape is actually black. Its not quite as reflective as the normal white stuff but its much less visible when taped onto black components of the bike.
Side view. I decided to only put 3 larger reflectors on each rim, with the idea that when the wheels are spinning, I want a visible gap between each one rather than it blurring into a circle - I want the movement. The tape goes over the entire cross section of the rim excluding the brake part. This means they are visible from behind and in front as well due to the angles covered.

Front view. The reflectors on the rims will work well as they spin around (as do the ankle straps) - you can see 2 on the front wheel and one on the rear wheel here:


Obviously I have lights as well, will try to take a movie of what it looks like at some point.