The 'Draw it Again' challenge is always a nice challenge to do. I have noticed when I've done those a few times, I not as much re-drew the same thing, but rather considered the redraw attempts as a means and opportunity to upgrade (or update, like a time skip) and re-engineer some of my designs as I go about them. In some other cases, being able to do a 3D rebuild as well either via Blender or Minecraft (Voxel-by-voxel) also adds another dimension to working with them as well (helps especially since every voxel is a cubic-meter; I can measure accurately as I work).
Kinda reminds me, I still have a long way to go before I can really showcase my progress with the Excalibur Airship (being built in Minecraft). Fortunately, I remembered how user-friendly MCEdit is for stuff like that (also given that it's also not as much a resource-hog as the game itself when played; though not as fancy graphically; it works), so I'm reserving using Minecraft itself for more detail-oriented stuff, but for the main engineering stuff, I'm using MCEdit for the big stuff that would be a hassle. Another anti-hassle measure I love that I can do is working on half of the ship instead (keeping the rooms empty, of course) and upon finishing, copy-paste-mirror what I finish, and get the job done more quickly (half the time, and half the hassle). Kinda a reason I made the construction site at the Zero-point on the flatgrass world. User-friendly build coordinates for giant megaprojects like that.
Just realized something. Once I get some more 3D production skills down, with Blender at least (better modeling skills, and of course texturing/painting them), I can always use my Minecraft models as reference, and re-build those to a more ultra-refined format, instead of cubic-meter blocks, they can look much finer, where necessary. Kinda like doing a set design kind of thing; plus, I can also animate them to work how I see them work, which would otherwise be a pain to work with in another format like Minecraft (at least, to make turbines spin and such). Of course, to do such ultra-refinement, my skill doesn't only need to get better, but so does my hardware. So, for the time being, I'll have to make do with what i got for now.
EDIT:
Always an awesome personal goal to try to reach. Whenever I can invest in a 3D printer, gain enough skills to make my own model kits based on my artwork. I mean, a fully movable 3D printed model of one of my ships would rock to have sitting on my desktop. Especially something as badass as the flagship/airship I'm working on.