Thumb safety comes out in between safe and fire. You push up around the middle of its travel and wiggle it till it slides out. The lug on the inside of the safety fits through a window in the frame for assembly and dissassembly. Thats what your trying to find when wiggling in the middle position. Go to youtube and type in 1911 dissassembly.
OK, the hammer now is cocked, somehow I managed to do that, so now the safety moves fully up and down, and I have it in the half way position and…can’t get it to come out.
I tried using the right safety switch as a sort of punch to help push it out, won’t budget.
Finally got the hammer back, the grip safety just right and moved the right side safety up/down while holding on to it pulling out and…it was a bugger to get out…but finally out it came and the rest of the parts nearly fell out of the pistol with a few pin pushes here and there. And, yes, that’s the FLGR stuff in the upper right corner of the cloth. I replaced it with the standard guide rod and plunger system, as you can see.
other than replacing a broken part or “upgrading” (I use this term with some hesitation!) a part, unless you fall into a swamp carrying your 1911 you’ll never need to detail strip for routine care. Many USGI guns were carried in some of the worst environments possible without ever being detail stripped for decades.