Check this link for Lippert slideout owner's manuals: Slide-Out Owners Manuals
With regard to the shower door - I recently posted my solution as a response on the Sunseeker section of this forum - adding a short (~4 inch) piece of 1/4 inch diameter garden drip irrigation tubing to the shower door in the latch area with GOOP (one of my favorite adhesives). Has been a perfect solution to date.
About the slideout - the motor mount for my 2012 Solera slideout broke off the frame after about six cycles. Solved by re-welding by a local RV repair shop. See my earlier posts on this issue. Since then, it has been good.
"Also ran" issue - tire valve extenders - "new style" airless extenders - not tied to wheels - whipped around while driveing, "jammed" one tire valve slightly open, deflated tire overnight (twice). Tie them up (wire ties seem to work). Also, tie the wheel covers to the wheels (again, wire ties).
Expect to add DEF (Diesel Exhaust Fluid) at about 4000 miles. I found after re-filling the DEF, I had to wait with the ignition on (all indicator lights lit) but the engine NOT started until the indicators turned off to re-set the DEF indicator.
Finally - see the Magnadyne posts on this forum. Expect some "bugs" - both from Magnadyne and from Forest River's application of the device.