I got the rangefinder to work follow this link.
I Got me a RC car for 10 dollars, a servo and managed to get it to work. Will post pic of the process.
Here is a new windows media file I made today, better lighting.
I begun by taking apart the RC car and take out the RC board like krillindb describes in his tutorial here http://tdh.prop-planet.com/viewtopic...c=6527&forum=2
Here I´m fitting it to a hole I made in the back interior that I made remember.
Next I put some tape over the board and hot glued it in place and taped the wires down. You can see that I cut out a square in the top to fit the on/off button I took from the car. I also drilled two holes so I could put the wires through that connect to the power supply and the servo. I then put the net over it and fit in over the key slots.
I drilled out a hole in the helmet were the rangefinder sits. I used fiberglass to secure 4 bolts, I glued the rangefinder to a small disk that screws to the servo.
The servo rests on 4 nuts that are screwed on the bolts in the right height and then I secured the servo with another 4 nuts.
The hole I drilled out with my dremmel.
And then the finishing touch. As you can see I hid the wires under the interior.