I have to praise Pancho for his inventive and the dedication put into fabricating this adapters. Although the picture that follows shows a clean base, it has internal passages that allow the correct flow for the spin-on filter
Another picture from my brother's:
This is my design, that was used for more than 20 years in a 3 Patrols. One from my brother, the one that I've always had, and another long gone. The problem with this design is that the flow passage inside the adapter is limited, and can make the safety valve inside the base to actuate constantly, effectively bypassing the filter. But I think it's good to show, since after this one, Pancho's design looks like a fine example of Italian engineering (way better than German
Pancho can add more comments, since he has the intellectual property on his.





