NGK BP5ES vs BP5EFS

[xaliscomex]

Just trying to get a few more questions answered.

I own a 1988 300sel (w126)

I decided that I'm going to go with NGK non resistor plugs

Now the question is,

Do I use NGK BP5ES or NGK BP5EFS?

I read that one has the crush washer(BP5ES) and the other plug has no crush washer and is tapered for correct seating.

I also read that some just remove the crush washer and then such plug becomes a BP5EFS.

Do I have the correct information?

And is a .030-.032 gap correct?

I called my local auto parts shop and they have 8 of the BP5ES plugs in stock

Please advise