2-piper, No disagreement there, you are correct in bringing that up and thanks for the clarification. It can be as important as clearing the cocking levers. The moral here is never to force anything - if it doesn't want to go, stop and think instead of pushing. My mention of interference was in response to gil russell's comment on possibly having to have the trigger blades adjusted. If there is resting trigger blade pressure on the sears other than the light spring you mention as the locks go in, there might indeed be an unsafe condition that should be rectified. Another good reason to remove the locks occasionally for inspection and maintenance, as wood shrinkage or compression over time can create this in some guns.
There is nothing complicated about this process that would put it beyond the ability of any gun owner who is willing to learn how to do it properly and excercise reasonable care.