When these intense Lube and Filter discussions break out I'm prone to think that if engine operators put near as much focus on other specific maintenance items such as proper fuel preparation (meaning filtering and atomizing) they would better serve their machines. It is perceived that clean lube and lots of it is the path to eternity. You can talk about removing contaminants from the lube but is it not better to prevent it's entry in the first place with good fuel preparation (therefore good combustion) and adequate clean air or good running conditions.

after reading all of this "cotton gin" waste contraversy, Wouldnt it just be easier and cheaper to install a spin on filter in place of the cartridge?

So, you are using an unpressurized oil source...

I will let the picture speak for itself. This picture was taken right after I started up my car with a cold engine and at idle speed of around 750 rpm.
http://i242.photobucket.com/albums/f...Coldidle-1.jpg
There is also another hole under those vacuum lines where I tested the pressure of the oil outside of the by-pass portion of the filter. Both inner and outer readings were essentialy the same.
I was surprised by this and removed the filter cap and blew compressed air through the little hole at the top of the stem to see if the check valve was blocked and air came out of the bottom of the stem. I retested it and I got the same results.
Evidently the spring/check valve has enough resistance that the oil pressure is maintained or I guess it is possible there is some bolckage down below where the stem goes; but I did nothing to block it.
In any event I hooke up my by-pass filter oil inlet hose to the center of the cap (this oil has already been filtered by the by-pass section of the stock oil filter) and I am getting that hot hose going into and out of the external by-pass filter.
When the oil gets hot the pressure at idle drops as is normal.