53a and its forward end will abut a stopping surface 53b at the front end of the channel to hold the snubber slide 60 against sliding forwardly off of the frame 50 the orientation of the tongue 34 and its weight causes the tip assembly 28 to hang downwardly at the angle shown in fig3 when the belt run 18 is vertical and the slot 52 in the tip body or frame 50 and the opening 63 in the slide 60 are aligned as shown in fig3 providing a vertical belt pathway through the tip assembly 28 thus the tip assembly 28 may freely slide down the belt run 18 from an upper position more closely adjacent the turning loop 22 to abut a stop 31 carried on the belt 15 to stop the tip assembly at the height of the stop the liner 100 is molded as a unitary piece and includes a flat panel 102 that extends along the under side 105 of the frame body 101 and a lip 104 that extends upwardly along a rectangular insert opening around the interior periphery of the frame body opening 52 39 defining the belt receiving slot 52 the liner 100 has a thickened rear portion 106 with a channel 108 for receiving a rear bar portion 56 of the frame body 101 behind the slot opening 52 39 and has a pair of hollow cylindrical projections 113 in front of the lip 104 that extend through a pair of holes 114 in the body flanking the channel 53a.