inches by 32 inches with a matrix of 1 2 inch holes 230 drilled on 2 inch centers the positioning fixture 200 is shown here with multiple work pieces clamped to it using a variety of standard and custom clamping devices the work surface 222 is mounted onto a tripod base 226 by way of the pneumatically actuated locking ball joint 224 which can be seen in the side view in fig8 the tripod base 226 is similar to the base of the first embodiment in that it has a central column with a lower vertical section 234 welded to a tilted upper section 236 inclined forward at 26 u00b0 from the vertical a short rearward extending leg 242 and two longer forward extending legs 240 are attached to the central column 234 by bolting them to three vertical flanges 244 which are welded to the central column 234 the flanges 244 each have a series of holes drilled in them to allow adjustment of the height of the fixture 200 the adjustable height of the base 226 also allows the base to be shortened to compensate for the extra height of the wheels 246 if the fixture 200 is mounted on the optional locking casters as shown in fig7 when the fixture 200 is used with casters a pair of angle braces 264 are also added to further stabilized the base 226 a control box 238 attached to.