I have a client that has this 3001. I am a tech but no experience on this model. The leaking toner is visible and there is spillage onto the paper that appears as a large blob that get fused onto the paper. Also some streaking. Could anyone tell me if there are drum seals on this model and if so how hard is it to replace them? And should the drum blade be replaced as well? The prints are nice and dark so the drum is good as well as the developer I estimate. The customer can print short edge first to avoid the left side but would prefer to print long edge first. Thank you in advance for your help.