Welding Parts are Offset?

I've been trying to make some constraint levers work for a few days now, they work fine and all except for the fact that the welding screws up and offsets the parts. (Screenshot below)

prntscr.com/dptvyp

Primary Weld Code

-- | Welds levers | --
Weld.WeldLever = function(Lever,CS,AS) -- Lever Model, Constraint Settings, Attachment Settings
	local Hinge = Constrain.Hinge(Lever,"Constraint",CS.LimitsEnabled,CS.UpperAngle,CS.LowerAngle,CS.Restitution,CS.ActuatorType,CS.AngularSpeed,CS.ServoMaxTorque,CS.TargetAngle)
	local A0 = Constrain.Attach(Lever.Joint0,Lever.Name.."Joint",AS.Position0,AS.Rotation0)
	local A1 = Constrain.Attach(Lever.Joint1,Lever.Name.."Joint",AS.Position1,AS.Rotation1)
	Hinge.Attachment0 = A0
	Hinge.Attachment1 = A1
	
	for i,p in next,(Lever:GetChildren()) do
		if (p.Name ~= "Joint0") and (p.Name ~= "Joint1") and (p:IsA("BasePart")) then
			Weld.NewWeld(Lever.Joint1,p,Lever.Joint1,p.Name.."Weld")
		end;
	end;
	
	for i,p in next,(Lever:GetChildren()) do
		if (p.Name ~= "Joint0") and (p:IsA("BasePart")) then
			p.Anchored = false
			p.CanCollide = false
		end;
	end;
end;

Weld Generator :

-- | Creates new Welds | --
Weld.NewWeld = function(p0,p1,Parent,Name)
	local w = Instance.new("Weld")
	w.Part0,w.Part1 = p0,p1
	w.C0 = p0.CFrame:inverse()
	w.C1 = p1.CFrame:inverse()
	w.Parent = Parent
	w.Name = Name
	return w
end;

Constraint Service :

Strain.Hinge = function(Parent,Name,LE,UA,LA,Rest,AT,Ang,Tor,TAMA) --Parent, Name (String), Limits Enabled (Boolean), Upper Angle (Int), Lower Angle (Int), Restitution (Int), Actuator Type (String[Servo,Motor or None]), Angular (Int[Angular Speed/Angular Velocity]), Max Torque (Int), Target Angle/Max Acceleration (Int) 
	local Hinge = Instance.new("HingeConstraint")
	Hinge.Parent = Parent
	Hinge.Name = Name
	if LE then
		Hinge.LimitsEnabled = true
		Hinge.UpperAngle = UA
		Hinge.LowerAngle = LA
		Hinge.Restitution = Rest
	end
	
	if AT == "Motor" then
		Hinge.ActuatorType = Enum.ActuatorType.Motor
		Hinge.AngularVelocity = Ang
		Hinge.MotorMaxTorque = Tor
		Hinge.MotorMaxAcceleration = TAMA
	elseif AT == "Servo" then
		Hinge.ActuatorType = Enum.ActuatorType.Servo
		Hinge.AngularSpeed = Ang
		Hinge.ServoMaxTorque = Tor
		Hinge.TargetAngle = TAMA
	else
		Hinge.ActuatorType = Enum.ActuatorType.None
	end
	return Hinge
end;

Help is greatly appreciated!