Wow, I've never seen anything like that before. That's very unique. Okay, so I can see that the rear cogs are intended to be kind of stiff; does this mean that it's a rare part that I can't replace with any bargain bin freewheel?

I'm going to keep shooting it with penetrating oil because it's still much more stiff than in that second video you posted. Does anyone know how to disassemble a Front Freewheel? I'd really like to regrease the bearings; they seem fairly dirty and I don't think it spins as efficiently as it could.

Is there anything in particular I should know about this system?