This may be widely known already but I came across this tool on Amazon the other day and bought one.
Comes with two of the rods plus the handle.
I intend to do a couple of modifications to it but tested it and it is easier on my hands that a hex key.
Mod 1 is to cut off about half of the 1.5mm dia section off. It is too long
Mod 2 will be to put some small notches along the side of 1.5mm section so soft filament can grab onto shaft a little better.
It is also pointed on the tip but that will go when I shorten it.
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