Detail about this micro quad build can be found here: https://oscarliang.com/angry-oskie-smallest-brushless-micro-quad-build/
If you don't have a 3D printed I can print the frame for you (you can order from the link above)
Beware the the frame marked with number "3" is for motors with 5.5mm mounting pattern, such as the RacerStar BR0703, and BoldClash 0703.
While the "5" is for motors with 6.5mm mounting pattern, such as the Sunnysky 0703 and 0705.
This frame is designed for the following parts:
If you want to discuss about this build, please leave your comment here: http://intofpv.com/t-angry-oskie-micro-quad
I don't check comments on Thingiverse very often.
Originally i was doing a 48mm version frame too, but because of the inefficiency of 31mm propellers, i cannot recommend it. Please use the 59mm version frame with 40mm propellers.