I *love* those "arc-proof" connectors in the DynaLites. I habitually shut them off and discharge them before connecting or dis-connecting, anyway, but it is nice to know that a minor transgression will not produce a three foot arc.
The other *great* idea, in my book, is the three-bladed synch connector. I shudder to think of the consequences of plugging a synch cord with a Hasselbald lens on the other end into "line" power, and the third blade prevents this, effectively. I'll *happily* go to Dynalite and pay the "big" money for these.