I think the tongue wt is directly relater to the extensions.Mine had 5 out 6 holes filled. Checking to see what is required to strengthen area for regular 8,000/800 tongue. The e450 will handle, the frame extension will not. I would like to be able to use higher tongue wt. I weighed with and w/o trailer. Impressive how tongue affects front axle. I was 15 lbs below front axle without trailer. Moved all heavy stuff from front to rear area.
__________________
|