Sounds like rowekmr did a new box?
But on the V10 (like rowekmr and I have)...while it is 'tight' to get your hands and arms down from above...that's the way I did mine. Not sure about the PSD versions like Stewart and CanadianSmokie have.
I think many have 'multiple' sensations going on. The steps Stewart outlines for the steering box adjustment is a good first step but as he noted...a cautious one to NOT overtighten the box as premature wear out or binding can occur.
Proper trailer setup and WD balance is where most suffer the most issues from and attempt to correct the Ex to correct the balance issue.
A trip to the scales to ensure proper tongue weight and WD application should be the first step. Once you know your TT/TV is properly balanced and you have proper tire pressure (trial and error on Ex unfortunately) and MAX tire pressure on TT, and you ensure you have a rear sway bar on the Ex...THEN it is my opinion you should start looking at your Ex more indepth.
PROPER WD application should be achieved following this thread.
http://www.tldirectory.com/cforum/index.cfm/fuseaction/thread/tid/17730894.cfm
Too many tag the Ex unjustly for improper WD/balance issues. While the Ex certainly is no dream TV out of the box...it is an easy target. BUT once you KNOW your balance on the WD is proper...and you STILL have handling issues...a few tweaks here and there are ALL that is needed IMO to get the Ex to be a DREAM!
Happy New Year to all!
joe.