You mean, your bikes don't have that with rear sets? interesting.

It's an option... but they are choosing to not go through the hassle of hooking it up.
Claim they never use the rear brake w/o the front.

Huh... interesting. Mine are all more simple than that. Just remove the stock pegs and bolt on rear-sets. There was one "complicated" part that was a tiny little secure clip that had to be put on with dental tools. But, that was it. Electrical for the brake is not with the pedal. And, if I want to go to GP Shift, it's one bolt.

Not that I want you to wreck again, but I'd like to know how those rearsets hold up in a crash before I decide to take that route over woodcraft/sato/gilles/etc
Yup, don't need it.

There should be a spring running to a wire that has a plunger like switch that sends the signal to the light.

Plunger is on the bottom... it's all contained. Just remove the old, and bolt on the new.

yeah you have a different style hook up then a lot of bikes. Yours is actually a button, not a plunger. I have a spring that attaches under the brake lever that pulls the plunger. It's not attached to the actual braking mechanism.

ahh ok... yeah I can see that being illegal

Kawiforums discusses these somewhat extensively (for a niche manu anyway) and there are guys on there who crashed. Check there if you want the skinny on crashing with them.

Got a link? I'm a lazy piece of shit.