First of all, the guidelines are just guidelines. They do not guarantee you success if you follow them nor do they guarantee failure if you don't. They are there to improve your odds of success, not guarantee anything. You may be successful no matter what you do or you may have problems. I sure cannot guarantee you anything. I'm saying this because some prople will probably come on here and say that that they do this all the time and just leave the eggs in there with the high humidity, don't turn them, and they hatch out fine, where others will say they raise the humidity but open the incubator and turn the eggs. Sometimes those eggs/chicks can be pretty tough.
Which of the 25 or 5 eggs are your most valuable? I personally would put the least valuable in the homemade incubator and leave the more valuable in the one you have the most trust in. Since you have two incubators, I would split the eggs and I'd be tempted to use the homemade one as a hatcher.
If I had only one incubator, I'd jack the humidity up but continue to turn the eggs. I have shrink-wrapped a chick before by opening the incubator during lockdown (you do what you need to do) but I did not shrink-wrap all of the unhatched chicks, actually very few of them, even if they had already pipped. I'd worry more about not turning them than the humidity, but cut back on the turning to maybe 3 times a day and mist the incubator with warm water when you open it. How much harm you do depends some some on the type if incubator you have.
I do not have experience with your specific circumstances, but you asked for an opinion.
Good luck.