[B and C]

Sorry for the late response.  We went back to HWH in September for another attempt to repair the #4 slide.  After reviewing the problem again with an engineer, he said change out the hydraulic manifold.  They did the changeout in a morning and we stayed the night to make sure everything was working correctly.....finally.  I was frustrated because they just tossed the old manifold without testing/checking it for a problem.  After 2+ years and numerous solenoids, it would have been nice to know what was wrong with it.  We did return a couple of days later bc the hydraulic pump would not build pressure.  After more tests, it was determined the pressure switch had failed.  It was changed out and everything works fine.