Got a brand new Colt base pin and base pin bushing that I told seller was for 1st gen. The base pin measures diameter .2513" which is bigger than my 1st and 2nd gen. revolvers and the pin will not go into the frame hole. Also, when the bushing is put into the existing cylinders the cylinder will not fit back into the frame as it is slightly too long. Any thoughts? Do I have a 3rd gen pin and bushing maybe?