As somebody who actually works on vessels that are actually build, and as somebody currently working on an calculation tool much like springsharp but for an a lot smaller series of vessels, I cannot help but comment on this.
Springsharp is a tool. and tools are only useful when used correctly, and when checked with data, experience and skill. Redhorse is likely one of the few people on shipbucket who actually use springsharp correctly.
IIRC, Redhorse, you posted a long time ago an description how you design your ships, with deck plans and everything. do you still do that?
Springsharp, in my opinion, should not be used to see if what you have drawn is possible. as said, the outcome is different from what reality proves. it should however be used as an early design tool, giving you parameters like displacement, strength, stability etc which would otherwise be quite hard to find out without actual shipbuilding experience. creating an actual ship design from that data, is something that takes skill, time and experience. this, and nothing else, is the difference between the case of Redhorse and the 'various discussions held on springsharp in the past'.
talking about putting reputation on the line
Now, onwards with this awesome thread full of awesome, in my opinion all workable and good looking ships!