Definitely do not take my post as a criticism of the standard supplied mechanism. Ceramic leadership, however, unlike the original may be in contact with the saw belt without generating heat. Sparks on my first picture are due to contact saw belt with a metal parts support. Ceramics is definitely better.
Also noteworthy is the replacement belt with better quality. The original is rapidly losing edge consequently tends to shun the cutting direction as the pressure on the support belt even worse.