I just looked at my paper work from Galen and with my options (very few) he shows my Shipped Weight for my 340/727 Challenger weighing in at #3020 which after looking at all of the above weights, this has to be too low.
Note: If the shipped weight means with very little gas, than a full 18 gallon tank would add apx. 108lbs (6 lbs/g) to the above figure to total 3128lbs. That still seems light to me.