Remember that the Ruger people don't have it quite right, either...they say to put the LONG grip screw in on the GATE SIDE of the frame, but a statistical average says that this is wrong about half the time...it depends on which side of the frame the original assembler put the groove in the hammer pivot. If he put it in on the LEFT SIDE of the frame, that's where the long screw should be, too. It works fine on either side, BUT BOTH THE SCREW AND THE GROOVE THAT IT ENGAGES HAVE TO BE ON THE SAME SIDE. Otherwise, you'll bust yer screw and hate yourself.
Also, the leetle, teeny spring-and-plunger assemblies (one for pushing the pawl [hand] forward [in the back of the frame, just above the left rear frame screw] and one for tensioning the cylinder stop [bolt] in the front of the trigger guard) are kinda ticklish to get in...they're also difficult to not lose when you're opening things up. Be patient and careful. A little dab of heavyish grease helps, too.