What's with the pink studs? I have never seen pink lumber before. Is it a special type or did you just paint them to make them more waterproof around the shower area?
One of the tricks that I learned working in a shop that does tinting is that other than getting the windows absolutely clean, the edges are the next hardest part. If you end up with an edge that you dont like or can't get flush to the edge, just use some 1/4" black pinstriping and go around the outside of the window to hide the edge of the tint. This can be applied to the outside of the window and helps fix small mistakes in trimming.