I did a sod of a hawthorn hedge today - I've just got the last thorn out - it was a particularly difficult one and needed some extra access via a Swann Morton scalpel.
But, I did wait until you'd finished your tea.
I have the British version and the coupling has required considerable fettling - it's still not 100% reliable, though it is a lot better than it was straight out of the box..
Polystyrene / styrofoam cutters have been around commercially for a long time - many different formats are available.
Much used in R/C aeromodelling, etc.
Nice.
I keep a set of these in the car first aid box - marvellous for extracting splinters, thorns, etc. - you can even "follow down the hole" and pull it out by the end.
Any improvement, however small and however late, is to be welcomed for what it is. Extra usage will provide extra revenue - and extra pressure for further improvements. Is this isn't seen as a "success", than that reduces the likelihood for any further improvements.
I've some experience of the Prague public transport system , probably very similar to Vienna's. That will have been up and running at a time when car ownership was at a much lower level than it is now. It wouldn't be easy for anybody to justify the expenditure or the disruption that would be needed to build it now.
As mentioned elsewhere, the Sleaford Model Railway Show occurs on Saturday, June 3rd, 2017.
I often head West around that time, but, if I'm about, I may head back to the flatlands...