What's your component removal system?

[Nowhere-Man]

It's long winded but experimentation allowed me to develop some more complex calculations. I've been known to do exam questions (mostly dated ones) but I also try to make alternative calculations. I was doing some with air cored transformers and found some interesting ratio patterns I still have scribbled down. Some of my maths wasn't learned in a book but just derived from a calculator. Just for fun I tried to work out how long it would take to get to Europa (the moon) at the speed of light and then at rocket or shuttle speed. Then you wind up getting into relativity.
Actually I enjoy the theoretical side maybe more but I'd like to have some practical application to it.