This is the Intrepit type from "Star Trek: Enterprise" also referred to as "half-saucer" by the production team. Original mesh by David Metlesits. I took the lenght of 165m from ex-astris-scientia.org and scaled it to match the Star Trek Tactics/Attack Wing NX-Class ships, which are at approx. 1/4400.
This version is optimized for printing in Versatile Plastic. It features vewer details, thicker walls and no mounting hole. I also made an optimized version for Detail Plastic
with more details, thinner walls and a socket for Attack Wing.
Be aware that the price for Detail Plastic Shapeways calculates for this includes a per file and a per part fee. You only have to pay the per part fee for this when I combine this with one or more items in Detail Plastic. So ask me to combine all the items you want to one single file to get it cheaper.
If you need this in another material, size, quantity or combined with one or more of my other parts for cheaper printing, just let me know. I will try to make it as you need.
If you want to see my custom-made Star Trek Tactics ships, visit my thread on hcrealms.com.