better and stronger than before. We are doing in maths vectors and differentiation again and so I will go back to basics an rewrite my problematic gravity code. I worked it out on paper anyway.
It is really annoying to have lost the sourcecode though the only link still working to internet based ones is the googlepages one that is the exe and the only one I ever gave to someone else to test was an exe. Though perhaps if I am lucky there might be an early version on the main computer J my hopes rise again.