I think that for a new machine (for HUO) the eject/shooter lane combo, ramp protectors are a must if the factory didn't use them. I've noticed that magnets are often poorly adjusted and that creates a lot of the wear. Scoops are the place that I think the cliffys are less attractive so I think the mantis are awesome. My tron with ~2k plays shows zero scoop with just the mantis.