I have. its a little tippy in the fast corners. I spent a good 2 hrs changing stuff and I'm going to try again today.

wish it was a little easier to work on. factory stripped a screw in the rear diff. left it at first just to get the truck built. an hour to remove the diff and replace the screw and oil (wich was nothing but a coating). in the process I striped the head off the lower motor mt screw. the chassy seem to get in the way so a good hex driver can't get straight on. just something to watch out for.