Looks pretty good so far, but a change I might suggest; in the third pic, after the barrel-roll, the coaster goes into a diving banked turn, then into a rising banked turn in the same direction. The problem is that there is a small portion of flat track in between the two banked turns. Since both banked turns are in the same direction, the small amount of track connecting them should also be banked, this would give the coaster a more realistic look. I don't know . . . maybe I'm just picking nits.