Just bumping this thread with some quick videos I took after another practicing of my non-existent photography skills... Will upload those those in a bit!

 

Same height. That's why the cup kit was a must.

I do not drive with the lip on. I'm ordering another lip that I won't care about scraping up.

 

About 5 minutes. I have it set up where 4 screws hold it on.

Lol, I'm totally jamming the double rainbow song at the next meet!! :d

 

When air is not applied cup kits act as a solid spacer on top of the coilover. This is one of the advantages - you retain ride characteristics when the cups are not inflated. The best way to think about it is an air piston sitting on top of the spring. There is a "piston head" that is pressed down by air supplied by a tank and compressor. The spring sits under the piston and could be thought of as the "piston rod". Air fills the small space above the piston, pushing it down which raises the car.

Different companies recommend different things when it comes to riding with air in the cups. After fiddling with these things for about a month prior to installing I can tell you that it would be easy to blow the seals on these if riding aired up. As stated, air in the cups compresses the spring which changes preload and effects the ride.

The bad part about cup kits is they are very expensive. The Top Secret cups for sale in the marketplace now are $5000. Umbrella goes for about $3000. This is all after the purchase of coilovers. On the G35, only kits for the front are available. Due to clearance in the rear cups are not possible. They also raise the car a max of 2 inches - which may be a deterrent for some... along with price, but the performance is superior to bags and maintenance is none. Failure on cups is close to zero - as long as you have a good compressor and air lines. They do not crack or tear like a bag will.

I have Function Form coils.