Lego Barrett M98B (working) + instruction
TIP: Right-click and select "Save link as.." to download video
Initializing link download.....
LDD file http://www.mediafire.com/download/7jmh71n16i5b77r/m98b_by_bear(LDD)_completed.lxf
Here it is. I spent for about 70 hours on it (building time). maximum range is near 12 meters. correction is for about 25 centimeter on 9 meters.