MANY, MANY CONGRATULATIONS!!!
Gosh, I've been holding my breath all day waiting for that post! Was beginning to think you had chickened out (excuse the pun) and I would have completely understood if you had. That moment of scalpel in hand is incredibly daunting isn't it! I had the same thought....She will die if you don't have the guts to do this.....get on with it!
It probably took me about 15 mins to tease all the bits out through the small hole I made, but it might have been better to open the incision a bit bigger and get it all out in one go and over with more quickly. Sounds like you did a really great job. Don't you feel so good when you see that great pile of gunk and realise that there was no way it was ever going to come up or go down.
If you can, I would change them all over to crumbles whilst you are away just to make it a bit easier on her crop as it will be irritated. I would give her small mushy feeds with egg and probiotic 3 x today and if she is eating happily and pooping, you could try introducing some dry crumbles tomorrow as well as some egg separately to help build her up and see how she does. I would put a little Apple Cider Vinegar in her water (just a few drops in a cup of water) just to help rebalance her digestive PH. If she is getting sloppy feeds, don't worry if she doesn't drink much or even at all but you want to see her water going down once she is eating dry crumbles.
Will be keeping my fingers crossed until your next update..... and looking forward to hearing about empty feed bowls and plenty of poop

. If I remember rightly, Vippy's poops were quite liquid at first.
I really am delighted for you. I knew by your posts that you needed personal encouragement to get through it. I'm so pleased I was able to help, but those people who made the You Tube videos are the ones who most deserve our thanks.... as I'm pretty sure, without them, neither of us would have saved our chickens.
It's all in the lap of the Gods now but you have done as much as anyone possibly could. I have read more than one account where people took their chicken to the vet for this same surgery and it died, so even if she takes a turn for the worse, you can console yourself that you have given her the best chance you could. The fact that she is eating straight away is very positive though and I'm pretty confident that she is over the worst.
It might be worth removing access to any straw dry grass or hay as I had problems with Vippy eating straw the minute I put her back in the pen with the others.....literally the first thing she did..... as you can imagine I was horrified!
Anyway, WELL DONE YOU! Considering that you are squeamish I think it is truly inspirational that you overcame it for the sake of your chicken.