I want to pass on some of our lessons learned over the past year and a half living with our full wall slide. We have learned it does require a bit of TLC and following some specific operating dos and don'ts.
First tip is to keep the front and rear hydraulic operating cylinders synchronized. Over a long period of time our got out of synch and the front of the slide would not consistently close and seal - it was not moving at the same time as the back by a small amount. I think this happened because we would release the close (and open) switch as soon as the slide stopped moving. Making a long story short, over time this misaligned the front and rear operating cylinders. If one looks at the end of the cylinder shafts you see that there is about two inches of "play" where the shaft moves before it pushes or pulls on the slide. If the two shafts do not pull or push on the slide at the same time the slide gets slightly cocked in the opening. This had happened to us. The fix is easy - hold down the operating switch and let the hydraulic pump run for about 15 seconds after the slide comes to a stop. This will move both of the hydraulic rams to the same position and re-synchronize them. This fixed our problem.
Here is a picture of the end of the operating shaft.
You can check to see if you have a synch problem by watching the slide come in and see if the "pull" end of the hydraulic rams engage and start pulling the slide at the same time. When our rams were out of sync there was about an inch difference between front and back.
Another tip is to keep the three bottom support "bars" and their support rollers lubricated and clean and also keep the hydraulic shafts clean and lubricated with silicone spray. Our cylinder shafts had paint all over them that I cleaned off with some Goof Off. The rollers that support the three support bars also need to be lubricated and I used an old fashioned oil can with some motor oil to do that. There is a lot of weight being carried by those rollers so I was reluctant to use WD-40.
Here is a picture of the support roller in the overhead of the LP bay.
Finally make sure all the fasteners on the mounting hardware remains tight. there are brackets at the end of the support bars that locate the slide and allow for some adjustment. One of the brackets had the adjusting screw locking nuts loose and it had moved about a half and inch. I readjusted to original position and tightened all hardware.
Here is a picture of the bracket...
I hope this information is helpful to anyone will an SFT model and keeps you out of some of the problems we have experienced and solved with a bit of trial and error.