Nino can u have a close look at the LE Walking Dead machine u have at your workshop and compare to any other type of flipper mechs or pop bumper mechs and give an opinion if they are the standard accross the industry etc.
That way, it will tell me if the TimeZone machines are sloppy from massive massive usage or if the flipper and pop bumper mechs are just lighter in design than what they used to be ? Or if the design is fine etc.
Your quick study may give some insight to the issue ?