The rear cabin openings on the AH-6J are too small, however Dragon's rivet detail is reasonably accurate so its obvious where the openings should be expanded to. The clear inserts were glued into position and allowed a day or so to really harden. These are pained once the model is complete so there is no need to be worried about any blemishes or glue marks.
New opening sizes marked
A series of holes drilled with a mini drill and a 0.6mm bit
The opening filed to size
The clear portion also needed to be trimmed to size.