Well let me try this again as my response did not go through last time. The 62mm pulley appears to be a well solid built pulley. There were no issues with the install except couldn't find my strap wrench and had to go purchase a new one the 62mm pulley went on very nicely with just enough clearance to be on tight but not soon tight as to need a bigger hammer. I do not have the psk so I am worried about slippage. The. Belt did not have a lot of slop but could have been tighter. The big thing I noticed was the difference between the backing plates. On the ec and factory pulley the rivets sat in holes that had been cut into the backing plate. On the 62mm pulley there are no holes in the backing plate and the rivets are punched through then the exposed part is sanded or turned to be even with the backing plate. Hope that makes sense