The 6n137 worked great for isolating the serial at a ttl level, full baud rate isn't a problem. 

Cant say the same thing about hackaday.io when used with iceweasel.

I will made a point of posting the isolator schematic  (its pretty straight forward if you get your pullup resistors the right way around)

I really have to make the new buck converter now, I keep putting it off... I got the P channel fets and they are great. One of them is running a solar project at the moment.

I hearby click publish trusting my text will not dissapear...