My question is, is it possible to be considered for the DEFO at the DESO interview?
The answer in short is Yes.
Also, would I be burning any bridges or causing any ruckus to attend the DESO interview and then express my preference to be considered for the DEFO position.
You have possibly already set your self up for a fall. You have already been told that your not competitive enough for DEFO.
You have accepted the DESO interview yet your saying your not really interested being an SO. CX will hammer you in the interview as to if you really want to join the company.
Be prepared to answer the big questions regarding "Why CX, do you want to live in HKG and why etc etc...
Why do you not want to be an SO?
Have you thought of taking the SO position, getting the seniority number then getting your extra hours on a CX aircraft. When you have them apply for the Freighter FO position. Not many guys wanting to go back that way.
Having said all that I know of guys who have turned down CX interviews 3 times and still been invited back.