I have a Taurus 66 4 inch barrel, made in 1987. Im having an issue with getting the side plate back on. I will admit from what I've read I may have the screws messed up. They all appear to be the same length but I'm no gunsmith. If I lay the side plate on with the thing that rotates the cylinder no in the gun it lays great. If I put that in it lays funny. And when I tighten the screws I can't pull the trigger or cock the hammer. I have to back the screws out a bit at a time to relieve tension then its fine BUT at least one screw is very loose. WHAT AM I DOIN WRONG!?!?