my 2 cents worth...i bought one too...costs a little more here...$60 CDN, which is about 45 US or so...used the bevelled gasket...the instructions say to use the flat gasket for flush-mounted threads and the bevelled gasket for raised threads...install took about 5 mins...looks great...it is offset, and the smaller hole makes it harder to see inside when you're filling...i just take it slow and easy...no spills that way...
'02 Blk/Slvr BA, Jireh fishtails, Freak, no AI, 160/42, 18T
She is the Beauty, I am the Beast.