Thank you everyone for the input. I will try to read more about this topic too. Sorry to distract everyone else from the laser build.
We had the 6mm Castle Connectors on our 70" Slick. Then, our friend Ralph liked the 5.5mm Jeti connectors for 70" plane so we tried them and liked them. Here are the 8mm connectors for up tp 300 amp draw... no spark. Anybody running with these?
http://www.espritmodel.com/jeti-afc-anti-spark-connectors-8mm-300a.aspx