Hatching turkey eggs help, please!

Hi folks,
A little help/advice, please?
This is my first time hatching anything, I've got one of those styrofoam incubators I'm borrowing from a friend. I started out with 27 fertilized turkey eggs. Everything has been going great so far. After candling, I'm down to 8 good looking eggs with a good air sack and a little bit of movement inside. Tomorrow is day 28 and I've been in lockdown for a couple days (since Friday), but I have stil not heard any scratching or internal pips. Is this okay?
My temperature gauges show close to 100 (I can't be super accurate because it's not digital) and the humidity is about 78 or so.
When can I expect to hear scratching, pips and/or when can I see some progress with this?
Thank you!!

Anytime now, if the incubator has a auto-Turner be sure to remove it, we stop our Turner 3 days before pip date to prevent damage to the babies.

Yes, two days ago, when I did my second candling and removed the dead/non viable eggs, I placed the remaining eggs on the wire mesh of the incubator. I did take them out of the auto-turning thing.

Is it normal that there have been no internal pips, if tomorrow is the 28th day?

Thank you for your response, by the way

I did not hear peeps till the 28th day and by then there was a peck hole. I used the same incubator you have, manually turning the eggs 2x/day. I did not candle as bad ones wont explode till well after the good ones hatch. I did not have a thermometer but filled the groves in the styrofoam with water to keep the humidity up.

I started with 12 turkey eggs and 7 hatched, and 6 guinea eggs and 5 hatched. 1 turkey died after about 3 days but 3 weeks later they have finally graduated from the downstair bathroom to a secure spot in the coop.

That's so encouraging to hear, CJ!
Actually, a few minutes ago I noticed our first little crack on one egg! I can't even begin to tell you how excited I am!!!

Yeah I actually posted a video of the eggs peeping on my FB page. People could believe the noise was coming from those eggs that were moving a bit!

One has hatched!!! But still no sign of anything going on in the other ones