Unsolved Variable AirRide

Hello,
I am in the process of updating some Automation mods, and in doing so I have followed the tutorials on how to add air-ride.
This works fine however I would like to be able to have more settings e.g. a default height, off-road height and lowered height.
The issue is that the hydros seem to be able to either contract or expand from their original size and cannot do both... so I need to have some sort of centre point in between the hydros max travel and minimum travel... but idk how to do that.
It can currently only do either the max height or the min height and no in between, in between being here I would like to put a default height


max. height

min. height

Various files used

keyboard.json

Code:

{
"bindings" :   [
    {
    "control"           : "pagedown"            ,
    "action"            : "heightdown"          
    },
    {
    "control"           : "pageup"            ,
    "action"            : "heightup"          
    },
  ],
"name"              : "Keyboard"          ,
"version"           : 1                   ,
"devicetype"        : "keyboard"          ,
"vidpid"            : "6F1D2B61"          ,
"guid"              : "{6F1D2B61-D5A0-11CF-BFC7-444553540000}"
},

lua

Code:

local M = {}

local function onReset()
  electrics.values['lifter'] = 0
  electrics.values['lifter_input'] = 0
  electrics.values['shoot'] = 0
end

local function updateGFX(dt) -- ms
    electrics.values['lifter'] = math.min(1, math.max(-0.0, (electrics.values['lifter'] + electrics.values['lifter_input'] * dt * 0.2)))
end

local function liftBarrel(value)
  electrics.values.lifter_input = value
end

-- public interface
M.onInit    = onReset
M.onReset   = onReset
M.updateGFX = updateGFX
M.fire      = fire
M.liftBarrel = liftBarrel

return M

input_actions.json

Code:

{
"heightdown"   :{"order":  3, "isCentered":true,"onChange":"custom_input.liftBarrel(-5 * VALUE)", "title": "Toggle Ride Height Down", "desc": "Changes Ride Height Down" },
"heightup"   :{"order":  4, "isCentered":true,"onChange":"custom_input.liftBarrel(5 * VALUE)", "title": "Toggle Ride Height Up", "desc": "Changes Ride Height Up" },
}

airstrut f hydros

Code:

"hydros": [
            ["id1:", "id2:"],
            {"beamPrecompression":1.0, "beamType":"|HYDRO"},
            {"beamSpring":55200.000000,"beamDamp":0},
            {"beamDeform":88419.546875,"beamStrength":435162.875000},
        ["fh1r","fs1r", {"inputSource":"lifter","inLimit":1,"outLimit":0.65,"inRate":1,"outRate":1,"inputFactor":1.0}],
            ["fh1l","fs1l", {"inputSource":"lifter","inLimit":1,"outLimit":0.65,"inRate":1,"outRate":1,"inputFactor":1.0}],
            {"breakGroup":""},
    ],

Any help is appreciated!

edit: info on current ability