Oil filter thread a good one, Don!
Most threads here will end up in very good information regardless how they started.
This one started very well.
Different sizes of the filters good to be aware of.
I was sure that Emgo filter was crap that could fall apart, but good experience showed up.
I used a filter 9 days ago on my K2. Filter mayb from Yamiya years ago.
Finally a filter with o-ring not too thin. This was even slightly thicker, 4.6mm.
The oil bolt o-ring got Viton 15x2.5mm with tighter fit, outwr as inner.
Same as used on CB750 oil lines to engine.
Less oil weap at front after that on my K6
I had plans to pull engine on my K6 to reseal cases.
Filter o-rings the worst reason.
I have a bunch of 79x4.5mm o-rings since filters usually have no or too thin.