Alvin g
Upright pinball cabinets have art that comes off if wiped with a damp cloth.
Gi plug not only burns up it can blow traces on the power board.
Flipper links are ridiculously thin and break easily.

Suncoast
Cannot remove coinbox without lifting the pf.
Ramps and wireforms are way to thin.
Few welds on witeforms.

Heighway
Undersized power supplies
Ft underpowered computer
Usb cables
Usb hub
Using two single row connectors for leds and switches
Induction switches should have had a spacer or greater range of detection.
Leds should not have been chained together
Brittle plastics
Servo controller easily fails
Cabinet design traps heat

Spinball
Unique flipper bats
Very little diagnostics
Artwork comes off with a damp rag

Spooky
Double sided tape to save on screws
Aprons on amh and rz
Amh uses screws instead of posts
Over reliance on servos in amh and rz

Add any of the alvin g head to heads to that list.

The original plates were fine for how long the machine was supposed to last.