I offer no helpful critique. I only want to say:
HOT DAMN!!! Her I am stuck in the early summer heat of Central Texas, USA, with no prospects of ever getting out, & some wonderful someone has made it possible for me to dance all over the map of--ummm--not England, but the UK. I started, it turns out, in Wales. I'll save another area for another day.

I'm not so interested in the complex math formulae as in the time & effort it took to train the crows...Tw