Thanks - I have included it in the notes rather than the main body since there is a lot to read on that site and also others and since the kata can be solved without reference to other sources, yet contains a sneaky twist, I didn't want users to get the impression that there might need clues from elsewhere...

Yes, it's intentional that the user needs to work out what would be a 'reasonable' default value for MaxIter.
To say how I calculated the value in my solution would be a spoiler, but let us just say that you could use a higher value, but your results wouldn't change.