Yes, on Octifant's last point....
Steve, I’ve managed to download your earlier versions and will do the latest one shortly. It’s superb, and I think I’ll give up the lawn and just play with it from now on!
I have 2 questions:
You can achieve a good result many ways by different combinations of variables – height, offset etc so I’m a bit puzzled about how to focus. Would it be right that the height variable should be pinned down to “as low as practicable”, and then the other variables can be tweaked? Or are you and Gordon undecided about height?
Secondly, you can get the stone to just stand up, but a very marginal alteration to the parameters will take it too far and it will pitch forward or not far enough and it will fall back. So I’m wondering about margins of error – A.) should the adopted computer model be one where X% variation in the variables won’t matter, as it will still work, and B.) should the real-world arrangement include “emergency buttressing” for if the stone pitches forward unpredictably?