Improvements/fixes for inconsistent PP750 trigger action?

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I truly love my PP750... except for the inconsistent trigger action. Besides varying in let-off weight, it tends to wear-in to too light a release (eventually slipping off the sear). I then adjust it enough heavier to not worry about, but within a couple hundred rounds it repeats the same cycle.

Sometimes being of the "if it ain't broke, don't fix it" mindset, and always hesitant to dive into the unknown, has anyone else experienced similar PP750 trigger issues? And if so, come up with a good fix? 

Thank you in advance.