Help with scaling MultiBars in Classic

Guides UI and Macro
1

Hello. I have a simple add-on (below) that scales the MainMenuBar, MultiBarLeft and MultiBarRight. It works perfectly, except when I change a page on the MainMenuBar, both MultiBarLeft & MultiBarRight rescale to normal size.

Is there a way to override the :SetScale() function so that it won’t re-scale after I change it the first time? Like re-define that function to do nothing?

-- Create frame to 'listen' for the event 'PLAYER_ENTERING_WORLD'.
-- This event happens every time the UI is reloaded or a loading zone is crossed.
local EventFrame = CreateFrame("frame", "EventFrame")
EventFrame:RegisterEvent("PLAYER_ENTERING_WORLD")

local function CritMove()
	-- Scale the main action bar and the two vertical bars on the right
    MainMenuBar:SetScale(.9)
    MultiBarLeft:SetScale(.9)
    MultiBarRight:SetScale(.9)

	-- Scale the entire minimap
    MinimapCluster:SetScale(1.1)

	-- Resize and move the player frame
    PlayerFrame:ClearAllPoints()
    PlayerFrame:SetScale(.9)
    PlayerFrame:SetPoint("CENTER", UIParent, "CENTER", -250, -250)
    PlayerFrame:SetUserPlaced(true)

	-- Resize and move the target frame
    TargetFrame:ClearAllPoints()
    TargetFrame:SetScale(.9)
    TargetFrame:SetPoint("CENTER", UIParent, "CENTER", 250, -250)
    TargetFrame:SetUserPlaced(true)

	-- Hide the text for the experience bar
  	C_CVar.SetCVar("xpBarText", "0")

end

-- Bind the frame created at the top to run five seconds after PLAYER_ENTERING_WORLD is triggered
EventFrame:SetScript("OnEvent", function(self, event, ...)
    if(event == "PLAYER_ENTERING_WORLD") then
        C_Timer.After(5, CritMove())
    end
end)