Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to build a single tank biodiesel processor [title] Gather together the few common items listed under " things you'll need. [step] " [title] Assemble the drum. [substeps] Cut a large opening (about half the top) in the top of the steel drum.

Ending1: Leave sides open to conceal the motor's slot. Draw the bottom of the drum apart, allowing enough room for the motor. Ending2: Cut the other two open at a 45 degree angle. Use a painted metal wheel or hole puncher to drill a hole between these holes. Ending3: Push a two inch (5.08 cm) hose through the opening and remove everything else. [title] Grind the urethane paste into your steel drum. Ending4: You may also be able to find a drum with the top already removed. Drill a 1.5-inch hole in the bottom of the drum.

Answer format: ending1/ending2/ending3/ending4