Hi, I'm not entirely sure this is the right place for suggestions, but I have a feeling this would be the right mod to add this.

On the picture, there is the upper back belt moving. I'd like to make the belt below the basin move. I'd need some kind of friction wheel that a belt could make turn. This way I wouldn't have to add an extra shaft and belt to connect the upper and lower belts.

Thanks in advance for your consideration.

Friction wheels sound reasonable, but belts are smaller than a block, so the wheels have to look comically large to touch the belt.

Yeah, I didn't think about how it would look if the wheel was placed above :/
From under the belt, it kinda looks better. In my picture, it looks like the 2 belts could touch and the belt above can move the belt below.