Are you going to winterise it as you go?
Who, me?
Nope. I want to have two tanks. One for bio from clear, and one for evreything else.
I will only use the 'everything else' tank in the summer, and only the 'clear' in the winter.
We have a frost here that's not breaking during the day. I dont know what temp it is, but its cold. Im currently running on 100% bio using the same technique (but im making the fuel as i go)
The difficulty will be separating out the 'whites' at a low enough temperature - in summer they may be clear.