Hi guys, Even I have been thinking about something like this . And I think using something like a solenoid or electromagnet would be more simple than using a motor for the nozzle lif ting mechanism . And if the nozzle height difernce is 3mm , I think that is sufficient enough not to have a cover for the nozzle. And using a solenoid type actuator we can use spring return type mechanism . that is, when the solenoid is energised the nozzle comes down . De energise it and the spring will pull it back. What I am thinking is whether I should put the solenoid for both the print cores or just one . Putting it fir both would be like making it more symmetrical , putting it fir only one is like making it more simpler (?) And cheaper .