Here is an opportunity for all of you crash guys to chime in. There are a multitude of arguments for and against the use of drag sleds, but there doesn't seem to be a consensus. I'd like to get comments from those of you that use one on a regular basis as part of your investigations. Tell me if you've had issues in court, and if you have, what was/were the issue(s) and how were you able to overcome them. On a personal note, as far as I'm concerned, as long as you follow "the rules," i.e., pulls parallel to the surface, pull through the device's center of mass and achieve constant motion and at least 5 pulls to get any 2 within 5% of each other, the drag sled is relatively reliable. Give me some input.