I decided to rebase the figures.
The bases are 25mm diameter and 2mm thick. The brass pin is 1.2mm. I drilled an exactly 1.2mm hole in the base and the leg. No glue involved. I will matt varnish the edge to reduce the shine.
I did try some with superglue and no pin. These were very delicate if dropped or banged and broke frequently. After repair, you can see the glue splodges and that looks untidy.
Also - drill by hand using a pin chuck and not a Dremel. Slow and accurate is the way to go, especially on the figure.
EDIT - I am now working my way through about 60 figures and droids. I start with the pin chuck and then drill with the Dremel. This is a bit quicker.