I posted this on another thread but got no response so I am trying again. I recently acquired a .45 Cherokee in mint condition, except that the lock pulls REALLY hard which, if your thumb slips, might be a bad thing. I called T/C and asked, was told the spring should loosen up with use but it hasn't. There is no rust or anything, just a really stiff lockspring. Thoughts? Replace it if so with what? Thanks in advance for advice.