Real moveable bridges sometimes use hydraulic-powered mechanisms to raise and lower the bridge deck!
Here's a bonus goal: Create the bridge first and test its sturdiness, then take it to the next level with the hydraulic lift!
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Tips and Troubleshooting
If the bridge isn't raising very high, then...
There may not be enough water in the syringes. Add water until there's a total of 10ml between both syringes (not including water in the tubing).
The syringe adapter may be tied too far away from the hinge. Try gluing the cable tie to the bridge so it doesn't slide forward as the bridge raises.