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As shown in our current design, most of these constraints can be met. We are using a slide mechanism that has a manual "brake" which allows the slide to be clamped in any position.
We have not found a way to get both slides on the same side of the lever arm as their "open channel dosing tubes" would interfere with each other. Currently, the slides are on opposite sides and could be awkward for the operator to manipulate. However, each slide can be moved independently and can be moved to the center line to allow the operator to secure flow if needed. The floats and weights will be attached via the brackets at the endpoints.
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