Hi, I too have a rover 13 and I am having some problems but I think we just about have it fixed. The limit switches seem to be rather flakey so we are in the process of cleaning the ones we can and replacing the ones that are really bad. We are getting error 3 on the panel and can only run the machine if we bypass the switches all together. I am in need of a operators manual for the NC 400 for this machine so if anyone has a pdf of it please email it to me. Toddutley@acetroncorp.com