Crossflash 1625 to 1620?

I know this question is crazy,but 1625 disable the overspeed function :sad: ,and I have no ls dvd to burn ,so… I want to try 1620 fw on 1625 ,Can I ?

Yes

How can I? I can’t find the last 1620 CVT fw file.

Just flash the B7T9.cvt that will convert it to a 1620 then download the official B7V9 firmware and you can use that to update it.

Thanks,I will try it.