reducing the part count reduces the chance of losing a part in the snow it may also reduce manufacturing costs fig3 shows back off mechanism 195 this embodiment comprises two cylindrical parallel non concentric bearing surfaces and a handle 200 for rotating the mechanism the smaller cylindrical bearing surface 202 is the corresponding bearing surface for anchor 130 fig1 the larger cylindrical bearing surface 205 is the corresponding surface for cylindrical bearing surface 160 a fig3 of snow support assembly 125 c fig3 fig3 shows an exploded view of how the back off mechanism is assembled to one embodiment of a shelter maker snow support assembly 125 c is the same as snow support assembly 125 fig8 except that cylindrical bearing surface 160 a in this embodiment is larger in diameter to accommodate larger cylindrical bearing surface 205 anchor 130 passes through back off mechanism 195 and through snow support assembly 125 c fig3 shows back off mechanism 195 assembled to snow support assembly 125 c and anchor 130 it also shows the motion of the snow support assembly when back off mechanism 195 is rotated 180 degrees when anchor 130 is fixed by snow rotating the back off mechanism by 180 degrees translates the snow support assembly a distance equal to twice the offset of the two cylindrical bearing surfaces 202 and 205 fig3 this causes apex 167 see.