As u already know - using original frame QX70 drone is unflyable. I have tried other designs from Thingiverse, but they did not fit mostly because of different printers do slightly different sizes and the motors does not hold in place. So first print O rings in different sizes to se which size is best to hold your motors, adjust size for frame inner rings, and print the frame. .f3d file is attached, so it is good for u if u are using Fusion360.
Using these props (uncut): https://www.aliexpress.com/item/5X-Eachine-3-Blade-Propeller-Prop-20Pcs-For-7mm-8-5x20mm-Coreless-Motor-DIY-Micro-FPV/32677121296.html?spm=a2g0s.90423188.8.131.52424c4ddMQ9QY