Please note that making the window border together with the glass the resulting gap between the window frame and the bodyshell would be too visible; due to the construction of the real windows, for this locomotive type this is a known issue even in H0 scale, so in N scale it would be even worse.Please check if it's possible to keep the window border engraved on the bodyshell as originally designed, a possible solution could be moving the parting line between front slide and roof cavity in order to include the curved top part of the cabin head on the front slide, to have more margin over the windows and at the same time hide better the parting line around the third head lamp.