I picked up my WOZ yesterday.
Here are just a couple things I've noticed.
#1...the munchkin playfield needs the Cliffy edge protector installed before launching the 1st ball. I've played 5 games on mine, and already my playfield has a couple chips.
I guess I should've installed mine before playing, but I figured a few short games won't hurt....WRONG!!!
I also noticed while disassembling the pop bumper so I can grind the area that rubs the ball guide, JJP's assembly is a little backwards compared to the Williams assemblies in regards to the steel plate and Phenolic plate. On the Williams machine, the steel plate is towards the playfield and the Phenolic plate towards the coil. Also, on my WOZ they're not using the thin washers that usually go between the pop bumper rods and the plates. It seems that with the pop bumper rods will cause the phenolic plates to wear and produce slop in the assembly, especially with the missing washers.