I know many of you beginners have problems using the dual injector the main problem guys is to keep the temperature equal in each of your Pyrex cups you could run it one or 2° off but keep it equal I run mine about 325 to 350 you can go lower but just remember to keep the temperature equal make sure everything is equal you can go down in temperature but just make sure that you keep it equal when you were shooting the dual injector. Make sure everything is also warm including your molds in your injector.