I'm wondering what you would do sir? You're not getting any kind of equipment between those houses... Get rock/ I've climbing gear? Tie it off to a truck and lock it out? Realistically... Come on. I see A LOT more variables I'm tying off to a truck. For the future damage caused the house by anchoring to the trusses then what I see right now. By the way this is almost one of the oldest tricks in the book electrical tape and the gun isn't strapped to a 2 x 4. This seems much safer to me but i am pretty ignorant with things