Yeah you jogged my memory what its like, it's a big boy grub screw compared to the usual small ones and it's on the frame not the trigger.
Your going to have to innovate buddy, locite something in there, but getting the spring/trigger right is going to be a mish
Set the front position, and the switch contact screw, then just freestlye with the last one. Hopefully you won't be out that way.