The wedge bulbs DO work, you just can't go cheap on them. When I did mine, I did a "test run" by purchasing several kinds of bulbs from Super Bright LEDs. I got the single, the 4 front, the 6 front, 4 side + 1 front, and 6 ultrabright side. This is the one you want:
Why? Two reasons:
1. These LEDs are brighter than the normal cheapos you see
2. None of them are pointing up. For even lighting you don't want *any* of the LEDs pointing up.
So in addition to those, I took some aluminum duct tape and lined the underside of the cluster with it to help direct the light upwards. This is from my Accord cluster:
My final Ranger cluster looked like this:
As a reference, my Accord cluster (note the high beams and "key" dummy lights are still regular bulbs)
That is with no sanding, all nail polish remover. For the Ranger, 5 of the aforementioned WLED-6 wedge LEDs, then used the 4 LED colored cheapos wedges for the indicator lights.