OIl filter sandwich plate

[krankieone]

I am hoping that someone may be able to help me I wish to install a sandwich plate between the oil cooler and the oil filter there are a company that makes one but they are very thick to accommodate the length of the threaded fitting the filter screws on to .My thought was to make a shorter fitting so a standard sandwich plate would fit (I have access to lathe etc) but I need to know how the fitting attaches to the oil cooler housing (I am rather hoping it is threaded in) and I cant find a picture or diagram of how it is attached .If anyone could shed some light on the situation I would be most appreciative.