I bought some 20 round Hungarian magazines from AIM surplus and they are a very tight fit on the frontal area of the magazine to the point where it is difficult to insert and remove magazines. The rifle is a romanian G parts kit and a ohio ordnance works receiver. It looks like the area where it's too tight is towards the front of the magwell on either side where it necks down to a narrower opening. Do I just gently file the sides of the magwell, or will that affect the fit and function of the regular 30 rounders? They are a little tight as well but not nearly as bad as the 20 rounders.