i dont think you need the trap. I owuld call SRI and ask them if it will work. It it will a GC with 3 fid’s is a find.
I am going to list my spare here but it has a TCD and I have the two of the wax columns for terpenes. In this machine I would consider the terpene column (and not just because I am selling a couple!) as you have multiple detectors.