NP231 has a star shaped bolt (like an inverted torx head) Its on the top of the case and goes from the back of the case into the front on the lip.

How do you take that off to take the case apart?

 

Inverted torx sockets. They can usually be purchased at the local parts store. Some parts stores may even have them in the loan a tool program.

 

Yeah, but you're better off buying a set - you'll need them again.

Use the E-Torx sockets to remove those silly damned screws, then replace them with a hex head or a hex socket head. They're still a standard thread - either SAE or ISO - so you can find replacements easily enough.

They're used to make manufacturing easier...

 

Are you sure it's an inverted torx?


It's most commonly a 10 mm 12 point bolt head.



A few torx ones are reputed to exist ... but I can't say I ever recall seeing one for all the cases I've split open.



Joe
EndlessMtnFab