Need Advice in All

So I have the doors cut out of the fuselage on my Jet Ranger 206, I left about 1/4" of material all around the opening and obviously the doors will not set flush with the fuselage. If I take the "excess" out the door will fall through, by adding the hinges and latch is this the right way to go to keep the doors from falling through? I have looked at several thousands of pictures and everyone I have seen looks like the extra material is left in place.

Been involved with RC fixed wing and some helicopters, built a lot of models from plastic to balsa. I now have my first scale helicopter from Vario. Did a lot of review research and picked Vario because of the high marks they got. But so far, I'm having trouble with some of the parts not fitting like the landing gear (skid ) horizontal stabilzers mounting to the stubs on the boom, if some one could answer the question if the parts not fitting correctly you should have to modify the parts to fit? Is this normal for a scale helicopter from Vario?