Fantastic video. I agree. These slides are very simple, once you get past the I can't do this fears. I have the EXACT mechanism, in fact the exact wood trim and wall paper border in ours. One time, the wife left something in the way of the slide and it hung on it on one side and instead of stopping, she just pressed the button down harder. That brought me to one more adjustment that you didn't talk about. There are gears and tracks on both sides but a motor on just one side. The two sides of gears are connected with a square tube as a driveshaft between. Each end has a bolt. She sheared one of these bolts. But, a bolt on just one side can be removed and by turning the square with a wrench, and measuring, you can quickly adjust the slide from one side to another. This might have been easier to do than what was shown in the video. really like seconds to remove the bolt, then make a small turn then put the bolt back. Of course on our, it was replace the bolt once aligned, but that was easy too.
Oh. If you replace that bolt, replace it with a very cheapo china bolt that will break easy. Better to do that than tear out some gears if something gets in the way. No dear, I'm not talking about you.