A way to eliminate spiking?

[Serum]

You will get a spark with a mechanical switch no matter what switch you use. period.

ANY switch will have extra resistance too.

The sparks produced by plugging it in; They do not harm your controller. What is ment with that story you are refering to are the peaks in Amperage and voltage, not the plugging in sparks. (the result of that is bad connectors on the long run, that could harm the controller like i said before) When you brake, and the plugs are not good (higher ressistance) they are not able to put back the energy in the battery, so the voltage will peak in your controller. That will kill your controller.

About your 'shortest wires around' what do you mean with that? I was only giving you a hint, not trying to get on to you? I can show you pics of my savage with the shortest wires possible. I still burned my controller on that thing.

If you are afraid of those sparks i have got a supertip for you there is a type of diode (can’t recall the name right now, it midnight here and I am not in the brightest mood) this diode will shorten any voltage above a certain level. Lets say 25-30 volts. These little friends can help you protect your controller if you think it is needed. (placed parallel over the controller) (you can also use them on the side of the motor.)