I am running Version 18n 64 bit on a computer with 8GB of RAM and an i7 64 bit processor. Sometimes, it takes 10 to 14 hours to save my work. I work in wireframe and sometimes stop and render along the way so that I can see what the patches look like. I am wondering if there is a way to shorten the saving time, or is there a way to know when rendering time for a frame is going to exceed 7 minutes or so, before I press the render button. What happens when I render sometimes is that the computer buffers (twirls) and twirls indefinitely. I try to abort, and the rendering program seems to abort but twirling continues, and I cannot get back to where I can start the 10 to 14 hour save. Usually when this happens, I have to kill the program and restart and lose all my work. Is there a happy solution to all of this?