I found this on Thingiverse, and thought that I should upload it here. 

"Found out what the range was on my transmitter unfortunately and crashed my Apprentice STS. Never liked the stock cowl design so I came up with this.

Use a 10% infill for supports without support roof. Change support angle to 70degrees to avoid unnecessary supports. Cut out for the front wheel with scissors. For locating the holes I used black sharpie around the holes on the fuselage so that I could see them through the cowl, marked the locations and then drilled. Flight tested and no issues. I think it looks better than the original, let me know what you think.

Happy flying!"

Thank you, 3doodler72 for this design.