Even i am facing the problem in the same,
Ciao Daivd,
I have an IWP solid lattice structure (3X3X3, with 20mm unit cell size) generated with Crystallon using the multipipe option. If I bake the lattice, I get a step file around 40 MB.
Now, I only need a step file of the lighter one, which I want to use for simulation.
If someone can help, it would be greatly appreciated.