I've been using this on my Schwintech gears, track, rollers, along with anything else on my 5er that moves & no problems. I use it on my slides regularly & it's about a third of the price of the CRC brand they show on the video, I purchase it Wal-Mart & have 2 or cans on hand at all times.
As for the gap you pictured it appears you need to sync the motors, extend the slide 3 - 4" then retract til it's in holding the button for 5 seconds & repeat this 4 - 5 times, this is the procedure the factory service team showed me when mine came in at an angle leaving a 1 - 1 1/2" gap on one side.
The service techs also recommended using Pledge furniture polish on all the rubber seals throughout the rv. Personally I use the imitation Pledge from the dollar store & works just as well.
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