Hi! I'm not new to 3D printing, and I've used a broad range of filaments (PLA, ABS, PET, HIPS). Recently I've bought a Flex filament from ICE-Filaments (a Thermoplastic Co-Polyester - Shore45D). Has anyone tried it? I think it's quite flexible, so I'd like to print a mould to cast some clay and other materials that are very moist and rich in water. How well Flex resists being in contact with water? Does it tend to warp? Probably I'll need to warm the mould up to 50°C to dry up the clay. If Flex is not suitable, what other filament could I use? Thank you!