Greg, Mach2 kits are very famous ones in this sense. Never tried them, but already scarred 🙂
Michel, I think I saw an acrobatic (or at least, non-agricultural) version of Z-37. And also KP released an army version of Z-37 kit.
I've spent some time trying to fit rear windows to its position in the fuselage. Finally, it was solved, and I've also added a layer of clear acrylic varnish to fill all the gaps and flaws.
Instruction doesn't give any paint numbers for the cockpit, only the color name – light grey. I've picked up a Tamiya paint, which I think should be light enough for grey. Also, according to the photos I have, it's more or less looks the same. PE seatbelts have been found in the box with the leftovers. I think it was some WWII German airplane.
The fuselage comes along very nicely, so I've decided to put putty everywhere on a seam line. Short run is a short run. Anyway, the only real problematic part is air intake – should be sanded from inside.