Need help with testing my 4.83 dualboot FW

So i made a 4.83 dualboot firmware but i don't have a hardware flasher incase it's defective,
I would love if someone with a hardware flasher could test the firmware i made.
WARNING - INSTALL AT YOUR RISK
RISKS:
BRICKING YOUR CONSOLE
BEING UNABLE TO INSTALL CFW

Download:
https://drive.google.com/uc?id=12uLKcrnVLYXZ7AUh_AuMVqFqeE5uDZGg&export=download

Patch notes:
Disabled ECDSA signature