1911 style guns have their trigger weight and feel governed by several factors, including the differing leaf spring tensions, which have to be balanced properly, and the sear and hammer hook engagement angles. If you haven't done this before, you need to do it under supervision or be prepared to go through several sets of parts as you learn. You may go through several sets even under supervision. Engagement angles in particular need special tools to be stoned correctly and not feel creepy. Your best bet it to go to a qualified pistol smith for the adjustment. If he can make the desired change with the spring alone, that's no big deal; maybe 15 minutes work with safety testing. If it requires reworking engagement angles it will take a good bit more time.
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