You can use any nozzle with our material. The best substrates to use are PEI (ULTEM), BuildTak or PI (KAPTON). VXL will stick perfectly to it when the build plate is warm and easily release when cold. You should avoid using CFC, Epoxy plates or glass. The adhesion is so strong, you will not be able to remove the layer sticking to these substrates. But don’t worry: VXL is dissolvable. You can put your build plate in the dissolution bath (take care of your build plate can take the alkaline pH of around 11,5).