Removing the sear, the safety, and trigger springs are pretty easy.
Sear, just remove the eclip first. Then press out. Safety, push down on trigger spring under it with either that point tool that comes in the VZ58 cleaning kit or a electrical probe tester on that little dot dimple to release pressure and then the safety pulls right out (dot on on long leg near #2 below).
However, I bent mine down with a screwdriver with it in. Positioned the screwdriver at spot 1 and hit it with my palm a half dozen times or so -- close to rear, but not so close that you bend the main rear angle on which the spring you're not bending relies... That moved out of way except for trigger fully squeezed. Then I moved to spot two just above sear hit it with palm twice and fully disengaged. No interference on other parts either. Mine ends up resting on top of my grip screw, so it's probably easiest to bend down w/o grip installed and then reinstall the grip -- unless my Ronin grip screw is taller than factory...
Showing the angle difference
*I took it out b/c I wanted to bend the intact spring in a little -- it was closer to the edge of the sear than I was happy with. Normally, gap wouldn't narrow as it comes towards the front/sear like it does in first pic. Makes it align more like the sear pic above w/ the dremeled spring instead of hanging on the left edge(facing forward) as it sat before I bent.