Although I never did it to the 335d, I was part of a very good forum (babybmw) back then and I knew several users who had done what you describe and had had no issues getting an MOT (same engine as yours, just in the 3 series platform).
The only place you may fall foul is if the MOT man can see the dpf has been tampered with from a visual inspection. I can't decide from you previous post if the specialist could actually see the dpf had been messed with, or if he deduced it from the readings. If it's visually noticable, one of those aftermarket theft guards might be your cheapest solution to hiding that fact.
If it does fail on emissions/smoke a good remap would sort that out, but honestly I wouldn't sweat the mot just because it's had dpf/egr delete and a remap.
