Very, very interesting and informative John, thank you for that. I will watch this many more times I imagine! Would love to see you do a series on tracking. Thanks again, great video :-))

Thanks for your thoughts I am glad you enjoyed it.

Excellent video John. Good clear and well informed information. Keep up the good work.

Great video John, I will definitely be sharing this on the blog

Thanks for your comments much appreciated 

Thanks Matt

thanks for the positive input

thanks john great info . plus I've had the chance of being at one of the course ..

You had me at evolution.

Just a shoutout to my lecturer: Thx 4 the link, that's a very helpful video!