Hellfish, the Tech page can probably help a bit.The instructions for the Full Flow conversion ID the hole(s).
http://www.inliners.org/tech/fullflow2.html I still think it's a good idea to have a filter, even if it's not full flow.
It may be only 1/6 of the oil but it's not filtering the same 1/6 all the time.
I like the spin-on idea, buy the filters on sale and change regularly.
Not sure how often is good in this case; once a year or 2000 miles?
