Hey, Garry! After some extensive research I can confirm that the square 1 bit in the Mako Driver Kit is NOT 1mm by 1mm. That said, the square 1 bit is about 2mm by 2mm, twice the size of the square bit needed for the SX-70.
As an added bonus, I also found 2 store page links that sell this particular screwdriver bit:
- Here is one on eBay...
- and another from Etsy
the eBay one uses a circular screwdriver socket, yet more easily available, while the Etsy one uses the standard 1/4" hex shank, but it's low in stock.
I hope you find this helpful!
-RG
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