has a motor 17 mounted thereto for driving an impeller 19 and auger 21 in a conventional manner the auger 21 is comprised of a housing 23 including sidewalls 25 and an arched rear wall 27 the auger housing 27 rotatably maintains by any conventional means an auger blade 29 referring more particularly to fig2 a skid shoe 31 is mounted to the auger sidewall 25 the skid shoe is comprised of a base 33 having a generally longitudinal extension with vertically arced ends a generally vertically extending strut 35 is fixably mounted to the base at one end by any conventional means the strut 35 has a first aperture 37 and a second aperture 39 located along a vertically symmetric center line 41 of the strut 35 at the upper end of the vertical strut 35 is located a vertical extending slot 43 offset from the center line 41 to one side a third aperture 45 is located above the slot 43 and offset from the center line 41 in opposition to the slot 43 each wall 25 contains at its lower end a generally vertically extending slot 47 directed along center line 41 and an aperture 51 located off set to the center line 41 referring to fig3 a 3b and 3c to mount a skid shoe 31 to either sidewall 25 the apertures 37 39 and 45 and slot 43 of the strut 31 can be cooperatively aligned to the slot 47 and aperture 51 of the sidewall 25.