Quick question. SSEi owners do not have to worry about the UIM failure, correct? If this is true, where else might I be losing coolant? No visible leaks or coolant on the ground.

You are correct to a certain degree. Your UIM is the supercharger. If you're loosing coolant, I recommend removing the supercharger and lower intake gaskets. Your lower intake gaskets might be taking a slow, painful death.

Correct. The LIM is the first place to look on an SSEi if there are no visible external drips. Especially if you have sweet-smelling exhaust and you're losing coolant.

If this is happening, replace your O2 sensor when you replace the LIM gaskets. They don't like coolant.

OK, The radiator has a small leak somewhere and the reason I saw no coolant on the ground is because it is collecting inside the front spoiler area. Not ready to do a radiator. Any concensus on what is the best off the shelf product I can add to slow the leak down? Or even better, stop it?

A little warning: Adding stop leak products can clog small passageways in your cooling system.

Bars leak has a good reputation for doing a good job. However..being the radiator..it is probably a plastic endcap and as the operating temp is reached it expands and contracts the plastic....it'* doubtful stop leak will work well for this type of leak.

Yes it is in the plastic resevoir. Luckley it is at the top of the cap and as of now does not seem to be too bad. For now I will just make sure to keep extra coolant on hand to top off the overflow tank. Thanks.