I had thought about tossing a tube in there but ended up not doing it just because I havent had time to run to any metal supplier and with the current situation they're typically closed before I'm done work. I'm planning on inspecting these occasionally and if I see a good bit of flex i'll either add the tubing as suggested or bump up the material thickness by .125in. To be fair though the rona will probably be gone by the time I have this on the road. 😅