Are you talkin about like in post #27? That's not limited slip, man. That's locking the axles together. Same as welding the spider gears. There will be no differential action whatsoever. The axles will be locked. But hey, if that's what you want, go for it!
Post #33. Also post #27 is not a spool of any kind, it is a device that uses pressure via the pin wedging it to the gears. It kind of cheap and crappy and would need modification to hold up for long. My idea in post #33 is different.