Sorry Joe, I completely ignored your question. My apologies. To answer your question, yes I was a little overly conservative as I was scared! One of the biggest problems with driving at reduced speed (90km/h or under) is that the trucks in Slovakia get up very close behind you at flash their lights at you to make you go faster. That happened a few times on the way back and it's a little unsettling. It just makes the experience that much more stressful having a big rig a few feet off your rear fender acting aggressively, but such is driving in eastern Europe.
I had a couple of moments where I charged above 80% on that journey but it was always forced, meaning that the car/charger stopped at 80% every time and I had to restart it. It's annoying, because I can chose "95%" on the screen, but it makes no difference; the charger will stop at 80% regardless. I can't say how much the charging cost on this particular trip (long story) but it was quite cheap.
Now, some good news: now that spring has arrived I finally removed my diesel heater!
It feels good to get it out of the car. I have a love-hate relationship with it. I love that it keeps me warm for free (I still have a couple of litres of diesel left!) and that it doesn't impact my car's range... but I don't like the fact it burns diesel.
I know, I know, it's nowhere near as bad as an internal combustion engine, but still... I dunno, I feel dirty.