As you know we will fit the hammer/trigger/spring kit into your trigger housing and return the old parts to you at no charge. Here are a few tips if you wish to do the job yourself. The mechanical job of fitting the parts is not too difficult but making adjustments that may be required to the original Beretta parts and getting the final adjustments correct is a little more tricky.
If you receive the kit as individual parts in plastic bags then the trigger adjustment screw will not be installed in the trigger. This is because the screw is coated with blue Loctite compound which hardens after the screw has been in position for about 12 hours. If we shipped the trigger with the screw in place the Loctite would harden before you received the parts.
There are two threaded holes in the aluminum trigger, one is for the screw used to adjust the trigger "pre-travel" and this screw is used with both the plastic and aluminum trigger housings, the other screw is used to adjust the trigger "overtravel" and this screw is used only with our aluminum trigger housing.
The "pre-travel" adjustment screw position is shown below.