I found a glitch in FAR with how it handles drag on the linear RCS port. The following images have just FAR and Kerbal Engineer (both are the most up to date versions) installed on a fresh install of 0.23.5 for this test. First picture is with the RCS port on the base, second is with out. Note the Cd in both pictures (0.005 vs 0.158). Craft are also simplified for this test down from what I discovered it with. Both these craft were put into about 10,000km x 15km orbit, and are identical other than the single RCS port. Video of both re-entries will be available once it renders and uploads.