The problem can be in the trigger lever itself, or as you called it the "L" bar, if the lever is not properly set/angled and the back face where the lever is cams for the trigger sear bar to ride over it, the gun will not ****, but allow the firing pin to slip on by and not catch on the sear bar...clear as mud??... I believe all the problem are in the new trigger lever, you may even need to change the degree of open/close of the trigger lever...and shipping to US for repair would not be cost worthy....but I believe all your problems are related to that lever, play with it....email me if I can help, even a quick phone call may help clear up the problem as perhaps I have not made myself clear here....I hate to say trust me, but I've done lots of these, and think I can help you more by a call then here....best to you
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