I am not in the teaching possition, I am learning but tnx you!.

The truth is that I have not tried real coil shorting yet, only with a reed but just testing.

I got all exited again when I looked at coil shorting videos like that one you talk about when the guy shows coil shorting and coil unshorting.

So I started to build the little machine that I currently have, but I did not started to make the coil shorting yet, when I was building it was when the advanced book was released so I tryed that first. But in the bench I didn't get what I was looking for and I got a little moral deception, lol.

But I will go ahead and try the coil shorting !!! I have some 250 mosfets and optos to try something, and halls and 555.