Proper infill settings

[haydenlc3]

Hello, I was trying to print a whistle the other day using Cura. The product description stated that the infill percentage didn’t really matter, but he printed with 100% infill. I didn’t want to use as much material so I set it to 80%. But when it started printing, my Anycubic i3 Mega printer started filling in the designed holes and extruded cuts of the model that are necessary in its sound functionality. I suspect it was an infill issue, but I’m not for sure. How do I fix this so that the holes are not filled in?

This is the model

https://www.thingiverse.com/thing:1179160

[djcs]

Good morning,
The one thing you didnt tell us was if you had supports turned on or not?
For the purposes of testing, turn supports off and try the print at 10 % infill.
Unfortunately, experimenting is the only way to find out : )

DJ