The DW 4-window conversion is not TOO hard, but definitely risky. I just did 2 on the 2 Kato engines I have and I think they look great. I (as Josh prescribed) cut the windows out VERY carefully so as to not cut too much! Because the detail is so fine, if you cut too much any little gap is going to be quite noticable. The directions don't specify how to put windows in, just the frames, so I had to learn by trial and error. I used some high quality clear plastic and cut it perfectly the same dimensions as the supplied frame. After it was satisfying, I test fit the glass in the side of the cab (which also had to be the EXACT same size) and made sure it sat in the side of the cab alittle further than flush to leave room for the frame. I then layered the 4 pieces of window frame OVER the newly installed glass with a very small amount of CA so I didn't mar the glass. After that, I had to custom mix some paint to match the Kato colors on the two middle posts of the frame. Lastly, I cut up some of those "roll-up" sun glasses you get from the optometrist and used it for tint. I will show some pics for anyone interested for an example! Your dash 9 BTW looks trick as well! VERY well done! The 4 window cab would be the finishing touch, but everything else you did makes it look good enough without it! Great job!
-Rich