•Tape PVC sheets together, draw a line along the long axis, 97mm from one side, and cut. •Glue the two 97mm strips together, and leave to bond. tape the other two strips together, and cover the top surfaces of both pairs with masking tape. •On the wider pair, mark another 97mm line on the wide edge. •Find the centre points of the squares, and prick with the compass point. •Draw six pairs of concentric circles of 12.5mm and 35mm radius in the six squares. •On the glued strip, Mark three lines, radiating from the centres, 120 degrees apart. •Mark points 25mm along the lines, prick with compass point. Do this in all three squares.  Mark these points for the 10mm drill. •On the unglued (wider) strip do the same for two of the three squares.  Mark the points for the 4mm drill.    Leave glued piece to cure. PT_Motor_mount_template.png Drill the 25mm radius points with the 4 and 10mm drill Drill the 70mm radius circles to a depth of 2mm (to help locate saw for final cut). Drill the 23mm holes through. Drill the 70mm holes through, carefully extracting the foamed PVC toruses from the holesaw after each cut.

			Sand smooth the edges, taking care not to enlarge inner hole

			Check fit of mounts in subchassis, and bottom layer onto mounts Loosely fit all M4 nuts, washers onto bottom layer with spare M4 bolts. Crimp end of brass tube around a 7mm allen key, to form a thin-walled socket for the M4 nuts inside the foam layers. Glue top (10mm thick, 10mm holes) layer onto bottom (5mm thick, 4mm holes). When dry, check fit of motor in central hole; the top of the motor should be flush with the top of the mount. If loose, then wind insulation tape around until a snug friction fit is achieved.  If all else fails, use an adhesive.