I have an older TC Hawkin. The lock works until the two screws that hold the internal workings on the plate. When they get loose the hammer stops before it hits the cap. When I tighten them all is good until the next time they get loose. [maybe 50 shots] The spring will fall out when the hammer goes further down and it does seem weaker than it should. Can I send it in to be fixed? Where do I need to sent it? Thank you for the help.