all has been said...
GB is a good & fun pinball, despite the fact you have to tweak it
(as YOU will enjoy it, because yes, from factory its a hard one to play) : carrot flippers or center post
(and frustrating) anti airball plastics, on the outlanes, but also over the 2 targets at the ramp entry
if you're a lambda player, code will be ok & enough as it, else it need for sure polishing