Stopping OpenVPN w/o breakage?

I decided to use one device and protect that for VPN uploads/downloads as I have Super fast Virgin fibre (well i couldnt turn down the kind offer of 500Mbs could I) and even the best VPN provider isnt going to get anywhere near those speeds. Have a look at my post:

I can then stipulate which devices to pass through the VPN gateway.

Just a thought