No Digits? This CAN'T work!

Try J J Olsen's amazing Thermodiamonds sudoku here: https://app.crackingthecryptic.com/sudoku/NF473RnHDn
Normal sudoku rules apply, and digits either increase or stay the same along the thermometers, starting at the bulb, which is at one end of the line, to be discovered. Multiplying the digits along one marked diagonal gives the same product as multiplying the other.

Видео No Digits? This CAN'T work! канала Cracking The Cryptic