I bought a HR 929 a couple of weeks ago and with some research I found that the main spring was broken and ordered the steel replacement and fixed that. Tonight I was practicing manually releasing the hammer and doiong some dry firing with empty shells in the cylinder and clearly something broke. The hammer no longer pulls back in DA and will only drop in SA on occasion. I'm sure it is some kind of spring on a gun this old. Is there any chance that this is something I can repair myself or is a gunsmith required? Any advice would be greatly appreciated.