Locked Groove

My brother sent me a link to this earlier today:  Record Playing VW Van.  (It's been out for a while, apparently, but I'm only seeing it now.)

Now, for starters, I'm not sure I'd want to play my records with anything called the "Vinyl Killer".  (Yes, that is its name.)  But beyond that, I'm curious as to how it works.

For starters, how does it follow the grooves correctly?  As it gets closer to the centre of the record, it's going to need to start turning tighter, and about the only way I can figure out for it doing so is to use the edge of the gooves as a guide.  Not sure about other people who still have vinyl kicking around, but I'm not exactly too keen about putting extra wear-and-tear on the edges of the grooves, especially given that the Vinyl Killer would likely require more force to move than your standard needle.  (How much force?  That would depend on the weight of the thing, and although it's listed as having its "[w]eight measured in volumetric sive" — whatever the hell that means — there's no actual weight quoted.)

That said, it is an amusing thing, but I don't think I'd let it near any of my records.  (Short of the silly/cheesey ones I bought for 50 cents or a dollar, and which were already scratched to hell to begin with.)  I'd also argue that anything that's sold with the warning "ne pas écouter vos disques rares avec le vinyl killer" defintitely isn't "essential for anybody who takes collecting vinyl seriously".

To be honest: at a price of $70USD or higher, I'm not sure who this is targeted at.

And, just to prove that mangling the language doesn't just happen when Japanese is translated into English:  ne pas écouter isn't proper French.  The verb should go between ne and pas, and should be conjugated.  Since we're dealing with a command, that would mean second-person plural (as vos correctly indicates), so the correct phrasing would be n'écoutez pas vos disques rares avec le vinyl killer.