Replacement trigger NMA 58 - Euroarms

[Sundance]

Recently purchased a few spares trigger being one of them, am I right in thinking that you have to give this a polish, possibly some careful filing etc..??  As the one in the gun were it engages you could cut paper with it.  Trigger let off very sweet, and can't fault it.

[44caliberkid]

  I fit a new one about a year ago and the top, where it engages the notch in the hammer, had to be thinned a little, then polish all the sides.