quote button seems to be broken atm
im not at my pc but i can kind of walk you through it
yes it requires the range extension
1) choose a planet move one tile diagonally up left then 1 tile DIRECTLY up ( 2 moves)
2 ) repeat but going down.
these two starbases should be in a vertical line as close as possible to each other equi-distant from the planet and just out of line with the planet
3,4 ) these two starbases are placed in vertical line with the first two ( one above and one below) and as close as possible to the first two
all four of these should be in a straight line the two on the end need range extension
5-10) the next six can be placed in the corners created by any two of the first four bases ( three on each side) two more straight lines
11-12 the last two will go in the corners created by the three starbases closest to the planet
if your first two starbases were to the left of your planet the the last two will be on the right
incorrect instructions see further post
i will link a screenshot later