I have a 3d r1, my z offset is off and cant figure out how to correct it in the settings, one thing ive figured out the other day is that i can manually adjust the z axiz, up or down, so i did and then it printed , Yeheyyyy. then after printing one project for 21hrs, it came out bigger than what i expected, or its like stretched longer, Im using mattercontrol. seemed like all the problem started when i downloaded cura,, and my z offset went crazy then i just cant get it to print right anymore. and Yes i have uninstalled Cura, to see if it helps, Is there anyway to like reboot the whole system,start fresh, delete the software from my windows and reinstall everything , cause this came out of the box printing good, until i tried messing with arduino to do the reprap controller, which didnt work for me. then i dl cura , which made it worse cause it went haywire and moved too high that the wire got disconnected . Need help please btw . this is supposed to be the back casing for an xxl controller.