"bad cast" error?

So. I have made a Morph which has a model, a script, parts and unions and a script that should add it to the player. But, I keep getting the error:

15:42:08.307 - bad cast
15:42:08.308 - Script 'Workspace.Model.Model.Spawn.Torso', Line 13 -- suitw.Part1 = G[i]
15:42:08.309 - Stack End

function onTouch(hit)

	if hit.Parent:findFirstChild("Humanoid") ~= nil and hit.Parent:findFirstChild("BTorso") == nil then
		local suit = game.ServerStorage["BTorso"]:clone()
		suit.Parent = hit.Parent
		local G = suit:getChildren()
		for i=1, #G do
			if G[i].className == "Part" or "Unionoperation" or "Model" or "Script" then
				local suitW = Instance.new("Weld")
				suitW.Part0 = suit.MainPart
				suitW.Part1 = G[i]
				local autoW = CFrame.new(suit.MainPart.Position)
				suitW.C0 = suit.MainPart.CFrame:inverse()*autoW
				suitW.C1 = G[i].CFrame:inverse()*autoW
				suitW.Parent = suit.MainPart
			end
			local bpW = Instance.new("Weld")
			bpW.Part0 = hit.Parent["Torso"]
			bpW.Part1 = suit.MainPart
			bpW.C0 = CFrame.new(0, 0, 0)
			bpW.Parent = suit.MainPart
		end
		local c = suit:getChildren()
		for i=1, #c do
			c[i].Anchored = false
			c[i].CanCollide = false
		end
	end
end

script.Parent.Touched:connect(onTouch)