Hello and WELCOME to the MarlinOwners forum, IMO its the best forum on the web for anything dealing with shooting..
I'm sorry I don't have the answers you are looking for.
The thing about this forum is the members here each have a great amount of knowledge but when you combine all of them in one place, will its a wonderful place to seek and get answers, find friends and just associate and converse with some really good down to earth, fine Folk's.
I am sure other members will be along shortly with the answers your questions.
Again Welcome Aboard...!!!