OK, a little more detail on ambi safeties.
There are three types:
The Swenson
The Colt
And the King's.
The Swenson type is the most common, and is used by Wilson, Brown, C&S, McCormick, and most others.
As above it's recognized by the "tab" or extension that goes under the grip plate, which has a slot inletted to retain the safety.
This is removed by removing the grip, and pulling it off.
The Colt type is recognized by the small "ledge: on the front edge of the safety, and the slotted sear pin it interlocks with.
To remove this one, you FIRST have to remove the LEFT side safety, then just rotate the right side safety up, and backward until it releases from the slotted sear pin.
The King's type, is a little more subtle. If you look at the underside of the safety, you will see a small dovetailed groove in it.
This safety has a dovetail on it's underside that interlocks with a grooved HAMMER pin.
To disassemble, remove the LEFT side safety, and as the Colt type, rotate the right side safety up and backward until it releases from the grooved hammer pin.
However, in all cases, the LEFT side safety is removable without removing the right side (ambi) safety.
To remove the left (Main safety) move it between "safe" and "fire" and remove it by wiggling and pulling it out of the frame.
Of course, the gun must be first field stripped,. and the hammer must be cocked. Some safeties are resistant and hard to grasp, but will come out without any force or use of tooling.