What are your thoughts on loading two materials in the same cartridge? Has anyone had success doing this? The reason I ask is that my build material is fairly expensive and I have to prepare the paste myself which is rather time consuming. To limit waste I am going to try loading a small amount of the build material and then load a cheaper (similar viscosity) filler material. The goal is to limit the amount of expensive material unused in the tubing but having enough total material in the cartridge for a successful print.