Hi there,   I am after some help with using a draggable range slider to control my timeline.   It is all set up and moves the timeline, updating the progress, but the final value falls short of the end of the timeline.   I have set a max-height for the main container to create a window, and am using the inner container height, minus the height of the scrubber and the height of the draggable handle to work out the progress, but the final progress doesn't reach 1.