WeldConstraint positions are sporadic relative to player's body part

Help and Feedback Scripting Support
,
#1

I’m attempting to weld a model onto the player’s left hand but it’s being sporadic.

I first found the offset between the hand and the model’s primary part by finding the distance if the left hand was at (0,0,0).

offset
offset1158×768 343 KB

Through this, I copied the the model and use “SetPrimaryPartCFrame” and developed this proximity prompt script.

prompt.Triggered:Connect(function(playerHolder)

	local PlrCloneFood = FoodStorage:FindFirstChild("Tomato & Egg Stir Fry"):Clone() --Model I'm trying to weld
	PlrCloneFood.Parent = playerHolder.Character --Parents to Player
	
	local offset = CFrame.new(0, -0.602, -1.122)
	
	PlrCloneFood:SetPrimaryPartCFrame(CFrame.new(playerHolder.Character.LeftHand.Position) * offset * CFrame.Angles(math.rad(90), math.rad(180), 0)) --"fixes" positioning
	
	local weld = Instance.new("WeldConstraint") --weld creation to left hand
	weld.Name = "Food"
	weld.Part0 = playerHolder.Character.LeftHand
	weld.Part1 = PlrCloneFood.PrimaryPart
	weld.Parent = playerHolder.Character.LeftHand
	
	PlrCloneFood.PrimaryPart.Anchored = false

end)

But this is just resulting in sporadic positions:
https://gyazo.com/9f8c1db7b9b53733386004c77b7a4d79

If I want the CFrame of the model to be relative to the hand just as the first photo shows, how do I fix this? The incorrect positioning is already one issue, but positions being sporadic as the arm swings is another.

If it helps, here’s a file:
Weld.rbxl (93.1 KB)

#2

Do you have to use the weld constraint? If not, here is a suggestion:
local model = game:GetService(“InsertService”):LoadAsset(482733036)

function attachModel()
local clone = model:Clone()
clone.Parent = game.Players.LocalPlayer.Character
local humanoid = clone.Humanoid
humanoid.LeftHand.Part1=clone:FindFirstChild(“LeftHand”)
humanoid.RightHand.Part1=clone:FindFirstChild(“RightHand”)
humanoid.Torso.Part1=clone:FindFirstChild(“Torso”)
humanoid.Head.Part1=clone:FindFirstChild(“Head”)
humanoid.LeftLeg.Part1=clone:FindFirstChild(“LeftLeg”)
humanoid.RightLeg.Part1=clone:FindFirstChild(“RightLeg”)
humanoid.LeftFoot.Part1=clone:FindFirstChild(“LeftFoot”)
humanoid.RightFoot.Part1=clone:FindFirstChild(“RightFoot”)
humanoid.AnkleLeft.Part1=clone:FindFirstChild(“LeftLeg”)
humanoid.AnkleRight.Part1=clone:FindFirstChild(“RightLeg”)
humanoid.HumanoidRootPart.Part1=clone:FindFirstChild(“Root”)
end

attachModel()