That is an interesting mod. My sliding window channel rubbers/strips are toast, and I could not find anything similar to adapt around here. I was wondering if I could have a flat glass cut to shape to replace the sliding window for a fixed one, but was not sure if it had some sort of lateral curvature. Since people are using flat ally to make these gullwings, I believe I would have a good shot at replacing my sliding window for a simple glass, I guess.
Not sure if this has been discussed in other topics.