TR4/A: Spin-on Oil Filter Adaptor

[ebk@buffnet.net]

Hi List!
    I'm asking for more input.

Given:
    I purchased a spin-on-oil filter adaptor for my TR4/A , last year.

Thinking:
    1- I'm NOT sure if it's the same for a TR3 engine, but very possible.
    2- That the past threads from other list members said the adapter 
part that threads into the oil head is to short :-\  to make a         
    good seal.        OR
    3- The inner 'O-ring' leaks when installed :-\ .

Question/s:
1- What was the problem with installing this Oil Filter Spin-on-adaptor 
so it doesn't leak?
2- How was it fixed?
-Cosmo Kramer