OD payback suggestion

The following is for hypothetical 4 player:
NOTE: "previousXXX" value (see below) can be updated every seconds OR minutes depending on desired payback period.
[
previousMetalOutput
previousEOutput_1
previousEOutput_2
previousEOutput_3
previousEOutput_4
metalShare = previousMetalOutput/4
{
currentMetalOutput
currentEOutput_1
currentEOutput_2
currentEOutput_3
currentEOutput_4

metalDiff = currentMetalOutput -previousMetalOutput
eDiff_1 = currentEOutput_1 -previousEOutput_1
eDiff_2 = currentEOutput_2 -previousEOutput_2
eDiff_3 = currentEOutput_3 -previousEOutput_3
eDiff_4 = currentEOutput_4 -previousEOutput_4

totalEDiff = eDiff_1 + eDiff_2 + eDiff_3 + eDiff_4
plyr1_share = eDiff_1/totalEDiff
plyr2_share = eDiff_2/totalEDiff
plyr3_share = eDiff_3/totalEDiff
plyr4_share = eDiff_4/totalEDiff

Function_giveMetal(player_1, metalShare + plyr1_share*metalDiff)
Function_giveMetal(player_2, metalShare + plyr2_share*metalDiff)
Function_giveMetal(player_3, metalShare + plyr3_share*metalDiff)
Function_giveMetal(player_4, metalShare + plyr4_share*metalDiff)
}
previousMetalOutput
previousEOutput_1
previousEOutput_2
previousEOutput_3
previousEOutput_4
]

PROOF:
case A: all positive E & positive Overdrive metal output
[
    previousMetalOutput = 100
    previousEOutput_1 = 10
    previousEOutput_2 = 5
    previousEOutput_3 = 6
    previousEOutput_4 = 7
    metalShare = previousMetalOutput/4 = 25
    {
    currentMetalOutput = 120
    currentEOutput_1 = 11
    currentEOutput_2 = 10
    currentEOutput_3 = 6
    currentEOutput_4 = 10

    metalDiff = 120 - 100 = 20
    eDiff_1 = 11 - 10 = 1
    eDiff_2 = 10 - 5 = 5
    eDiff_3 = 6 - 6 = 0
    eDiff_4 = 10 - 7 = 3

    totalEDiff = 1 + 5 + 0 + 3 = 9
    plyr1_share = 1/9 = 0.1111
    plyr2_share = 5/9 = 0.5555
    plyr3_share = 0/9 = 0
    plyr4_share = 3/9 = 0.3333

    Function_giveMetal(player_1, 25 + 2.222)
    Function_giveMetal(player_2, 25 + 11.11)
    Function_giveMetal(player_3, 25 + 0)
    Function_giveMetal(player_4, 25 + 6.666)
    }
    CHECK:
    previousMetalOutput + plyr1_share + plyr2_share + plyr3_share + plyr4_share= 25 + 2.222 + 25 + 11.11 + 25 + 0 + 25 + 6.666 = 119.998
    currentMetalOutput = 120
    *value matched to 2nd decimal, no missing value*
]
Case B: some positive E, some deficit E, and generally positive Overdrive metal output
[
    previousMetalOutput = 100
    previousEOutput_1 = 10
    previousEOutput_2 = 5
    previousEOutput_3 = 6
    previousEOutput_4 = 7
    metalShare = previousMetalOutput/4 = 25
    {
    currentMetalOutput = 120
    currentEOutput_1 = 14
    currentEOutput_2 = 3
    currentEOutput_3 = 4
    currentEOutput_4 = 10

    metalDiff = 120 - 100 = 20
    eDiff_1 = 14 - 10 = 4
    eDiff_2 = 3 - 5 = -2
    eDiff_3 = 4 - 6 = -2
    eDiff_4 = 10 - 7 = 3

    totalEDiff = 4 + -2 + -2 + 3 = 3
    plyr1_share = 4/3 = 1.3333
    plyr2_share = -2/3 = -0.6666
    plyr3_share = -2/3 = -0.6666
    plyr4_share = 3/3 = 1

    Function_giveMetal(player_1, 25 + 26.666)
    Function_giveMetal(player_2, 25 + -13.332)
    Function_giveMetal(player_3, 25 + -13.332)
    Function_giveMetal(player_4, 25 + 20)
    }
    CHECK:
    previousMetalOutput + plyr1_share + plyr2_share + plyr3_share + plyr4_share= 25 + 26.666 + 25 + -13.332 + 25 + -13.332 + 25 + 20 = 120.002
    currentMetalOutput = 120
    *value matched to 2nd decimal, no missing value*
]
Case C: some positive E, some negative E, and generally negative Overdrive metal output
[
    previousMetalOutput = 100
    previousEOutput_1 = 10
    previousEOutput_2 = 5
    previousEOutput_3 = 6
    previousEOutput_4 = 7
    metalShare = previousMetalOutput/4 = 25
    {
    currentMetalOutput = 80
    currentEOutput_1 = 5
    currentEOutput_2 = 4
    currentEOutput_3 = 7
    currentEOutput_4 = 8

    metalDiff = 80 - 100 = -20
    eDiff_1 = 5 - 10 = -5
    eDiff_2 = 4 - 5 = -1
    eDiff_3 = 7 - 6 = 1
    eDiff_4 = 8 - 7 = 1

    totalEDiff = -5 + -1 + 1 + 1 = -4
    plyr1_share = -5/-4 = 1.25
    plyr2_share = -1/-4 = 0.25
    plyr3_share = 1/-4 = -0.25
    plyr4_share = 1/-4 = -0.25

    Function_giveMetal(player_1, 25 + -25)
    Function_giveMetal(player_2, 25 + -5)
    Function_giveMetal(player_3, 25 + 5)
    Function_giveMetal(player_4, 25 + 5)
    }
    CHECK:
    previousMetalOutput + plyr1_share + plyr2_share + plyr3_share + plyr4_share= 25 + -25 + 25 + -5 + 25 + 5 + 25 + 5 = 80
    currentMetalOutput = 80
    *value matched, no missing value*
]
Case D: all negative E, and generally negative Overdrive metal output
[
    previousMetalOutput = 100
    previousEOutput_1 = 10
    previousEOutput_2 = 5
    previousEOutput_3 = 6
    previousEOutput_4 = 7
    metalShare = previousMetalOutput/4 = 25
    {
    currentMetalOutput = 80
    currentEOutput_1 = 5
    currentEOutput_2 = 4
    currentEOutput_3 = 5
    currentEOutput_4 = 6

    metalDiff = 80 - 100 = -20
    eDiff_1 = 5 - 10 = -5
    eDiff_2 = 4 - 5 = -1
    eDiff_3 = 5 - 6 = -1
    eDiff_4 = 6 - 7 = -1

    totalEDiff = -5 + -1 + -1 + -1 = -8
    plyr1_share = -5/-8 = 0.625
    plyr2_share = -1/-8 = 0.125
    plyr3_share = -1/-8 = 0.125
    plyr4_share = -1/-8 = 0.125

    Function_giveMetal(player_1, 25 + -12.5)
    Function_giveMetal(player_2, 25 + -2.5)
    Function_giveMetal(player_3, 25 + -2.5)
    Function_giveMetal(player_4, 25 + -2.5)
    }
    CHECK:
    previousMetalOutput + plyr1_share + plyr2_share + plyr3_share + plyr4_share= 25 + -12.5 + 25 + -2.5 + 25 + -2.5 + 25 + -2.5 = 80
    currentMetalOutput = 80
    *value matched, no missing value*
]