As many have mentioned, there are just some guns that don't fit a specific shooter. I have had some. Just had an experience with a Sig 320C. Me + that gun = ****** performance.
As an example where I did adapt is my Chiappa Rhino. I bought one because I love the engineering principle and like different stuff. First trip to the range was not so pretty. Did some research on grip style and the next trips were all where they should be.
I am more of a shooter than a collector so I would post that 3913 here on the forum. Reason being the guys know what each item you did to that gun costs and you did all the recommended things. So, you'll get credit from these guys. Post it on Armslist or GB and nodoby'll give you anything more than a plain jane 3913.
Just my 2 cents. Good luck.