Lance 1121 Dinette Slideout INOP

We need some help or suggestions about how to go about diagnosing and or fixing our slide out. We have a 01 1121 with a dinette slide and we cannot seem to get it to extend all the way out. Motor seems to be working fine, no unusual noises, extends out and retracts but only to the pint where it stops short, Motor engages and disengages manually and will slide manually but only to that point, but still cannot be pushed all the way out. The slide stops short of the access port beneath the cubby so I cannot even access or see the motor at all without taking a saw and cutting the access hole bigger. I am to the point where I may have to do that or attempt to remove the slide completely but not even sure how to go about that when I can only get it to slide out about 8 to 10 inches. We never had any problems with it before so this is a real bummer. One other thing, looking at it from the outside it looks like the slide may be cocked to one side since it looks like it's not getting a good seal when closed. I have looked and several videos and some are showing the support frame on the slide either broken or cracked but not sure this is the problem either. Any suggestions would be appreciated.