-- MUST be at the start of every MCP call
local model = workspace:FindFirstChild("MyBuild")
if not model then
    model = Instance.new("Model")
    model.Name = "MyBuild"
    model.Parent = workspace
end

local existing = model:FindFirstChild("TableTop")
if existing then
    print(existing.CFrame, existing.Size) -- read before calculating offsets
end

local Def = {
    Width = 6.0,
    Depth = 3.0,
    Height = 2.8,
    TopThickness = 0.2,
    LegSize = 0.3,
    LegInset = 0.1,
}

local top = Instance.new("Part")
top.Size = Vector3.new(Def.Width, Def.TopThickness, Def.Depth)
top.CFrame = CFrame.new(0, Def.Height - Def.TopThickness / 2, 0)
top.Anchored = true
top.Parent = model

-- Legs relative to top
local legH = Def.Height - Def.TopThickness
local leg = Instance.new("Part")
leg.Size = Vector3.new(Def.LegSize, legH, Def.LegSize)
local ox = Def.Width / 2 - Def.LegSize / 2 - Def.LegInset
local oz = Def.Depth / 2 - Def.LegSize / 2 - Def.LegInset
leg.CFrame = top.CFrame * CFrame.new(ox, -(Def.TopThickness / 2 + legH / 2), oz)
leg.Anchored = true
leg.Parent = model

local EPSILON = 0.05

-- Hole through a 1-stud thick wall
local wall = Instance.new("Part")
wall.Size = Vector3.new(10, 10, 1)

local cutter = Instance.new("Part")
-- Add EPSILON*2 to the axis passing through the wall
cutter.Size = Vector3.new(2, 2, 1 + EPSILON * 2)
cutter.CFrame = wall.CFrame

local success, result = pcall(function()
    return basePart:SubtractAsync({cutterPart})
end)

if success and result and result:IsA("BasePart") then
    result.CFrame = basePart.CFrame -- preserve exact transform
    result.UsePartColor = true
    result.Color = basePart.Color
    result.Material = basePart.Material
    result.Name = basePart.Name
    result.Anchored = true
    result.Parent = basePart.Parent

    basePart:Destroy()
    cutterPart:Destroy()
else
    warn("CSG failed:", result)
    cutterPart:Destroy()
end

local pillar = Instance.new("Part")
pillar.Shape = Enum.PartType.Cylinder
pillar.Size = Vector3.new(10, 2, 2) -- Length, Diameter, Diameter
pillar.CFrame = CFrame.new(0, 5, 0) * CFrame.Angles(0, 0, math.pi / 2)

local TARGET = "MyBuild" -- change to your model/folder name
local root = workspace:FindFirstChild(TARGET)
if not root then print("[ERROR] " .. TARGET .. " not found"); return end

local errors, warnings, parts = 0, 0, 0
for _, desc in ipairs(root:GetDescendants()) do
    if desc:IsA("BasePart") then
        parts += 1
        if not desc.Anchored then
            print("[ERROR] " .. desc:GetFullName() .. " not Anchored")
            errors += 1
        end
        if desc.Position.Y - desc.Size.Y / 2 < -0.5 then
            print("[WARN] " .. desc.Name .. " below floor")
            warnings += 1
        end
        if desc.Color == Color3.new(163/255, 162/255, 165/255) and desc.Material == Enum.Material.Plastic then
            print("[WARN] " .. desc.Name .. " uses default color/material")
            warnings += 1
        end
    end
end
print(string.format("Parts: %d | Errors: %d | Warnings: %d", parts, errors, warnings))

workspace/
  MapName/                  (Folder)
    Origin                  (invisible anchor at 0,0,0)
    Terrain/                (ground planes)
    Zone_Spawn/
      Floor
      Walls/
      Props/
    Zone_Arena/
    Landmarks/
    Lighting/               (PointLights, SpotLights)
    Spawns/                 (SpawnLocation instances)