Dropping a link on the WDH isn't the correct way to level out the TT, the chain link adjustment (number of links under tension) controls the amount of weight being distributed to the TV's front suspension and TT axles. The proper way to level out the TT is to raise/lower the WDH ball mount on the draw bar.
The following JOF sticky will linked you to a walk through on adjusting a WDH and may be helpful: http://www.jaycoowners.com/showthread.php?t=3873
Once you feel that the WDH is properly adjusted, a trip to a CAT scale will confirm everything you need to know: http://www.jaycoowners.com/showthread.php?t=3871
Also, if you running "P" rated tires, you may find that an "LT" tire will provide for better TV handling.
Hope this helps.