[Tip over jig]

That is really neat and it looks like a great way to access the underside of the car. Nice job!

[different 700R4's ?]

He probably used a brake switch that has two sets of contacts. One for the brake lights and the other would go to the tcc.

[different 700R4's ?]

If it doesn't have the port to the left of the servo you may just need to drill and tap it yourself if the case has the boss.

As an alternate, you could drill and tap the servo cover. 

[Monte Carlo Key chains ?]

I'd be down for one or two also.

[A few of the toys...]

Very cool collection!