Thanks guys. I'm really happy how the Vipers are turning out. The Mk V was kind of a spur of the moment design. I had an inspiration and drew a rough draft out. After a lot of fiddling, I'm pretty happy with it.
Yeah, I was basing the Stealth Viper on the Blackbird. At least the rivets are flush.
I replaced the panels already with strips that run lengthwise. The hull is in the form of a hexagon, with primarily flat panels.