Why does the model fall apart and spawn in the wrong place?

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
local debounce = false

Mouse.KeyDown:connect(function(key)
if key == "p" and not debounce then
debounce = true
local RinkakuModel = game.ReplicatedStorage.WorkspaceRinkakuModel:Clone() --Assuming the model is now in ReplicatedStorage

local   w = Instance.new('Weld')
w.Part0 = RinkakuModel.PrimaryPart
    w.Part1 = Player.Character.Torso
        w.Parent = RinkakuModel.PrimaryPart
            w.C0 = CFrame.new(0, 0, 0)

RinkakuModel.Parent = Player.Character
RinkakuModel:SetPrimaryPartCFrame(Player.Character.Torso.CFrame*CFrame.Angles(math.rad(Player.Character.Torso.Rotation.X),math.rad(Player.Character.Torso.Rotation.Y),math.rad(Player.Character.Torso.Rotation.Z)))

RinkakuModel:MakeJoints()
RinkakuModel.Name = Player.Name

end
    end)

This script should clone and weld a model in Replicated Storage onto my torso when I press "p" but instead it clones it where it was put into Replicated Storage and falls apart. I can't have it anchored because I wont be able to move with it while its welded to my Torso. So how do I make it clone at my back and be able to move with it welded to my while the model is unanchored. Please help?

The Script is a Local Script and I cant use a ServerScript because they dont work together.