Some people (and the instruction manual for the trigger itself) say that you need to lift up the board and slide the trigger out from that side, which would necessitate unscrewing and removing the frame. I was able to get the trigger out without removing the frame just by wiggling it a bit.
SRT E-Force #08330: The Gatfish
-Air America Apocalypse 68/45
-Dye Stainless Steel
-Viewloader EvLution II with Z-board
-Check-it Sure Fit Feedneck
-Dust Black CP Rail
...And yes, Aluminum is for pussies.
I'm like a tiger in a zoo.