I fly a type 6 with shields, I slip through the slot with others ships in the way all the time going about 100, sometimes when an NPC menace irritates me, I push them through the slot too. You can get through the slot doing 65 easy, practice lining up, once lined up, 65 through the slot will let you not get a trespass fine. And unless there is a type 9 coming through at the same time, you can pass any other ship in the slot at the same time.
NPCs are a menace, forget them, get in and out and do your business at the station.