First up is my purpose built two-version ships, Ferret Alpha & Beta. Alpha is a more nimble moderately equipped Naonite tech while the Beta adds a Trinium tech attachment to the rear with a ton more shields and other tech. It's hard to not think Frogger with the Beta version :)
Ferret Alpha (left) / Beta (right)
http://imgur.com/xjninl3
http://imgur.com/HVcgJ5y
http://imgur.com/t53L1sV