I won't attempt the math, but here's a couple updates on the sculpt.
I did up an LRM 15 pod for the alternate configuration. Not sure IWM will include it, but it's an easy part to add in.
Also decided what to do about the rotor. Instead of 2 flimsy ones, I sort of merged the two levels into one. I think it'll cast better and hold up better.
And one more, I realize that casting is going to be tough with the fins. I'd like to keep them attached to prevent dealing with super fiddly little fins. But I might need to make the tail separate. Here's a possible joint I setup for it:
The fins have to be thicker as well, there's a minimum scale for thin edges when casting.
Sorry, the pics are HUUUGE.
Thanks so far.
Dak