Making Said Model float above right arm

I've been trying and trying but I can't get Space Cube to float above my right arm and follow it. Any suggestions/help?

Personally, I think you could just use a weld to accomplish this.

cube = game.Workspace["Space Cube"]

function weldToTorso(part)
	local weld = Instance.new("Weld", part)
	weld.Part0 = game.Players.LocalPlayer.Character.Torso
	weld.Part1 = part
	weld.C0 = CFrame.new(0,0,0) --Mess around with this to find the correct place you want it
end

weldToTorso(cube)