Well, not new, I  tried back when I was 10 and trying it again.  Still have the same issues as when I was a kid dealing with some of the small parts for planes landing gear.  Would one of the plastic putty (like from Testors) be good for filling the the wheel well areas since I'd like to set the models up as if they were flying and no need for the landing gear.  Would this work or is there a better way to go about filling this in?

Thanks.