HELP! my 2720SL front shell is sagging

Hello all, we have owned our 1995 2720SL TM for about a year, and have been very happy with it so far. However there is an issue with the front shell. It is tilting towards the front of the trailer and it is off of horizontal by about 1.5-2 inches, and this is making it very hard to line up and close the door- in fact the door separates just about every time you step into the trailer. Is there an adjustment for this? Does adjusting the front torsion bars make any difference in the front -to -back alignment? It still opens easily, so no apparent need to adjust them, but I'd like to fix the tilting issue. Thanks in advance for any advice!
Erik