Drawing the Final Castle

Once we had finalized what our outcome would look like, and I had practiced the perspective I was to draw at, I could draw the final castle into its' place on our collaborative image.
It was quite tricky to work at, as it is fairly small on our page, and I have a much "heavier" hand than the others working on this piece, so I had to lighten my lines to match theirs and not skew the perspective.
I am mostly happy with this piece, but I still think I have to practice with perspective. The towers are too tall and the castle is too close over the horizon. I also had trouble with the crenelations on the battlements, as the merlons ended up quite "wobbly" because I had to work at a very small scale, and even with a finely sharpened pencil, my lines were too thick!
I am could also improve the glass "walkway" tube, which looks slightly twisted. It was difficult to portray a curved transparent glass tube at this distance, as many details that help make it look 3D wouldn't work in miniature.