I have a Browning made High Wall that was 38-55 caliber. Previous owner ruined the bore by not cleaning it after using BP. I sent the barrel to JES and it will be a 45-70 soon. Question is regarding the extractor...do I need a 45-70 specific extractor, can this one be "modified" to work or are they the same. Thanks in advance for any info, it is greatly appreciated!!!