Your goal is attainable and not too hard to do.

I have a full size 45 and have installed the Apex Forward Set Sear (FSS) trigger. It made a dramatic improvement. It reduced the reset distance and virtually eliminated the over travel.

I used the Apex trigger return spring during installation. This means mine is a little heavier than you like. I just measured it and it's breaking a consistent 5lbs 15oz. I'm told, if you use the spring that comes with the gun, it's lighter. Also, a little polishing on the sear, a little adjustment of the trigger bar loop, will all help lighten it.

A gun smith should be able to get it right where you want it.

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