Had a chance to look at the Viper a bit more.
I ordered the Kevlar tanks option and it came with two the second one looks to be about 50oz. It semi circular so I will I make a mount and put the curve down so I can use all of the fuel.
I also ordered the pilots to fit in the scale cockpit and the pilot option has been deleted so I will need to find hot looking babe to fly my Viper!
The cockpits are nicely done detail wise the tub are vacuum formed out of a thin plastic and then reinforced with glass cloth on the bottom side.
There was a very slight crack on the forward edge of one of the tubs from shipping that can be fixed with a piece of poly ply. In fact i'm going to cut a horse shoe shaped piece to mount on the front bottom edge of both tubs as I think this would make them hold up better from being removed and re-installed at during re-fueling.