Here's a pic of a rough alternative layout:
https://drive.google.com/file/d/1GCxhX1 ... drive_link

Here's the SH3D file:
https://drive.google.com/file/d/1ID_1Qv ... drive_link

It was made using a scaled copy of the original plan, so is accurate from that point of view. However it is not a finished design. A lot of things were just tossed in as placeholders.