I remember in 2010 when we was really interested in the X213 they really had a problem with the slide staying level when moving in and out and also had a weak motor. This all got corrected with the 2010 models... The rear of the slide would drop down and when it was pulled back in it would tear up the upholstery on the table seats and the couch.. When you looked at it it was very noticeable on the rear slide drooping down when extended...
Of course I imagine all of them including the newer ones today will eventually have problems with the massive rear door seals, That is one big door to deal with haha... I would really do the required maintenance on the seals for sure...
Hope you find out what your problems are...
WE really liked the concept but in the end never got it... Since there is only the two of us we came with plans to make the front "bycycle room" into a small storage area just inside the outside door and the rest of it with the bunks removed and made into a Office desk area with a hutch and small side table. This was to be for our office/computer and Ham Radio setup area ...
Would have looked something like this...
Roy's image
Roy Ken