@MarcAurel First, welcome back to the Family. One very big change from the 'Old Days" is that with 4.37 what used to be the "Alternate Launcher " is now standard, and has been refined. It makes setting up a HOTAS a lot easier.
One very useful option in DX Pinky Shift. When you assign it to a button on your x-56 ( stick pinky, for example) then a quick press will change FOV and if held enters a shift state.
As an example, lets use your trigger question. You can assign Second Trigger to your trigger. Then, holding your assigned DX Pinky down, you can also map First Trigger there. So, trigger pull with no DxPinky=Second trigger=gun. OTOH , pull trigger + DX Pinky held= First trigger.
Another cool trick to the Launcher is the release option. For example, let’s say you want to map your landing gear to a switch on your throttle base. You can map gear up to when you turn the switch “on”. Then map gear down to the release button , for when switch is “off”, or vice versa as you prefer