need help picking out prop adapter!
my prop adapter on my brushless plane broke.
i know that there are brushless plane motors with different sized shafts.
how do i pick a prop adapter that will fit my motor?
when i looked on ebay, there were some 3mm, 5mm ect. but i didnt know if that was the size of the shaft that it fits on, or the size of the shaft that the prop goes on?