Slingshot Cannon

Step 20: Cradle Sides Alignment

On the top of the cradle place a line at 2-1/8" in from the side that runs from the front of the cradle toward the back.  This is the line you will use to space the sides the correct distance apart to allow the barrel between the sides. (This is where problems will arise if you have different PVC then what I used.  You may want to do the calculations yourself.)  After the line is drawn you will want to glue the sides in place.  The sides inner edge is what you will place on the line. (You may want to try clamping it in place before glue and set the barrel in to check proper positioning.)  After you have glued the sides and clamped them in flip the cradle over so you can get to the 3/4" set holes you drilled for the lag bolts.