object rests upon the upfacing surface 32 and is firmly engaged with an edge 36 of the lip 34 so that the object can not inadvertently slip out of engagement with the resting means 30 this configuration is best seen in fig3 the object resting means 30 preferably includes a position adjustment means 35 that allows the resting means to be moved to and secured at any one of a plurality of positions along the tube 20 preferably the adjustment means 35 consists of an aperture in the resting means the object resting means 30 being positionable along the length of the second tube portion 24 so that the aperture in the resting means is aligned with one of the apertures in the second tube portion 24 and a securing pin is used to secure the selected position of the resting means 30 as with the securing means 25 however there are many possible embodiments of the position adjustment means 35 well known in the art that may alternately be implemented within the scope and spirit of the present invention a means for lifting the tube vertically 40 is positioned at the lower first tube portion 22 the lifting means 40 includes an elongate rod 45.