A simpler fix might be to create additional master channels on the BODY or head actors that drive symmetrical settings of the master channels on each pair of tentacles, that way one dial will give a symmetrical pose of a pair of tentacles. If Poser's symmetry functions won't do the job, use valueOperations instead.

Say in valueOp syntax:

actor rTentA01:1
{
channels
    {
    targetGeom SideSideAll
        {
        valueOpDeltaAdd
            Figure 1
            head:1
            TentASideSideAll
        strength -1.000000
        deltaAddDelta -1.000000
        }
    }
}

actor lTentA01:1
{
channels
    {
    targetGeom SideSideAll
        {
        valueOpDeltaAdd
            Figure 1
            head:1
            TentASideSideAll
        strength 1.000000
        deltaAddDelta 1.000000
        }
    }
}

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