I've started building a 1/3 scale Case boiler as per plans obtained from reduction engineering. I've been unable to find any information on the riveting of boilers of this size. The inside of the boiler is too small for a rivet gun if rivets are installed from the outside as per plan. Is there a special rivet gun or attachment for this application. What kind of rivets? Should they be heated? What steps do I take to prevent rust or leaking? Or is it possible to weld or braze the rivets on the inside to prevent leaking? Or should I just weld everything and use fake rivets. How are fake rivets installed? Any help would be appreciated.