Good Morning Bonzai,
Thanks for the post.
If you really want to get a better cup of coffee out of your Jura, I'd suggest running 4 cups at 100ml each. Thinking about it, if you are running a smaller ratio of water to coffee you're going to get a better balance and therfore a better cup. Give it a whirl and if you're still not getting a satisfactory cup of joe, then we'll revisit. We'll get that drive to work sorted!
Best,
Rob