The sliders were changed at some point in the Polaris.
I was helping a friend repair his Polaris which had a bad slider.
He also had a spare front panel from another Polaris. But when
we looked at it, the sliders were completely different. Not usable mechanically.
Paul D can back me up on this.

So anyway, be careful when getting a slider from another Polaris to use in
yours.

Bob