-Variant of prototype 10 and 15: System to determine electrically if there's still water in the bowl
-Better stability, more reliable 'spring-system', efficient operation
-Makes use of a PVC-tube piston with resilient material, some 'silicone molds' here, prototype 18
-Makes use of a large knob to adjust the weight
Expected +:More reliable 'spring system'
Expected -:Too weak resilience
Tested +: Better stability
More reliable 'spring system'
Tested -: ? (operation) -> will be tested soon!
(The production process can be greatly simplified by making use of the laser, vacuum forming, molds etc.)