That's a plan for future model And now a progress update - I've finally achieved good results in making a cup. It's rigid, strong and lightweight (~40 grams). It's made from caprolactone - some sort of lightweight and extremely strong plastic. Rather complex part, so it took a while till I've finally made it with good surface, ready for paint work. And now you see haw rare-earth magnets are mounted inside. Such construction is very precise and eliminate errors during assembling.