Phar0e,
I'm not familiar with the product itself, but do have friends that have added air lifts to their TV's and for the most part felt that it was worth the investment. It will firm up the TV's rear sag a little when towing, but doesn't increase a TV's weight limits.
Also, check with the manufacture of the air lift product you purchase and confirm if the system should be de-activated (or minimum air pressure) when initially installing/adjusting your WDH under loaded TV/TT conditions.
The X23J has an impressive CCC of 2,310lbs, be careful of your loaded TV/TT weights.
http://www.jaycoowners.com/showthread.php?t=3866
Bob
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2016 GM 2500HD 6.0L/4.10
2018 Jay Flight 24RBS
2002 GM 2500HD 6.0L/4:10 (retired)
2005 Jayco Eagle 278FBS (retired)
1999 Jayco Eagle 246FB (retired)
Reese HP Dual Cam (Strait-Line)