You have the excavator I want! I am waiting until next spring to buy mine though. I have a 7,500 lb machine now. Anyways, I run a chain over the blade and under the arms that connect the blade to the machine than back over the blade to my trailer. (kind of worded confusing) than on the oposite end of the machine of the blade my machine has a chaining eye that I run a chain through. Not sure if the 305 has that. If not you can lay your boom down and put a chain over your bucket. You want to endup with a chain holding the machine from going forward, and a chain holding the machine from coming back. And when the chains are tight obviously they will prevent the machine from going sideways. How do you like your machine so far? What size bucket are you using and what do you mainly use it for?