I installed PRM skids on my Z today. I saw that there was an extra mounting hole in the PRM swingarm skidplate that lined up with a boss on the swingarm that looked like it was just waiting to be tapped for a bolt. So, I drilled and tapped it and now the skidplate is held on by 6 bolts. All the mounting holes did line up by the way. Bring on the rocks!!!!