I was able to glean two things from your tutorial, and just wanted to share my appreciation with you. 1. The 'pushing the marble' technique is very effective and easy to master and has helped me a lot since I started playing KSP about 3 months ago. Your video(s) are very clear, with excellent notations. I'm sure this took a lot of work/editing, and I thank you. 2. Psychadelik Pedestrian were previously unknown to me, but are now firmly ensconced in my 'running' playlist as they have some brilliant tracks for running to. Thank you, pebble_garden