New to Microvellum and running into an issue with legrabox drawers. 

If I select 0.75" thickness material for base & back Microvellum models in the parts correctly.

But I want to use 5/8" material, and when I choose that the parts disappear from the model when I re-draw.  They don't entirely disappear though - a single drawer back remains in the model in completely the wrong position - the base & parts for the other two drawers in the cabinet are gone.

Has anyone else run into this?  Anyone know how to correct the issue?

Thanks

Alex