1/8" Line doesn't come DOT approved, because it is not required to be by the DOT/SAE code. It is made the same way tho, and will burst at 1200 PSI, approx, so there will be no problem running it....
As far as the 380c.... I'd never run one.
If I recall correctly, the CFM @ 0 PSI, is around 1.49??? Lets compare that to the 350c that has a CFM of 1.48 @ 0 PSI. So they are about equal, so it'd be fair to say that the CFM at 150 PSI is about .60, since the 350c is .58. As pressure increases, CFM decreases. Just for arguments sake, lets say the average CFM/PSI drop is .00593 CFM per PSI. Without displaying all the math BS, that means that at 200 PSI, the pump would be putting out approx .30 CFM. Thats not a lot, not at all, and filling a 5 gallon tank from 145-175, for example, would take about 5 min. IMO, thats too long of a time frame, so imagine going from 150-200... or even 0-200!!! That would take well over 12 minutes. And do you think that while that tank is refilling, that you won't hit any switches at all?? I know I do, quite often, which is one reason i like the 450's, because they have a higher duty cycle, so I don't have to worry about puttin an extra minute or two on my fill time.
Just my .02. These numbers are based on assumptions, which could be pretty close, or could be way off, for good or bad. If I had some real numbers to work with, I might be able to be a lil more precise. Viair doesn't have any info on their site yet.