Bob,
Are you sure about not moving the slides independently? If so, this is a step backward for Keystone. For years, the hydrolic pump has had a manifold with three valves on in the front compartment. They can be used to control which slide you open. Most of the time they are all left open, but the slide you want can be isolated. Check it out and report if you will. If this is not so, I will be totally surprised.
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