i took some lessons for doing gbnd
and tested on model of excalibur from stargate mod. Cutting off, resizing and other dirty tricks were used. New model (by size can be corvette) is little raw, but as joke is fully functional. Textures could be better, but i have still no idea (and knowledge too) about it, so its remains from mod.
there is zip
https://ulozto.cz/!ePZc4qGDnWWe/justice-zip