note the 13 12 11 are most normally also 10mm at shaft.
NO support needed,
print with all the drill holes pointing up.
13 12 11 10 9 8 7 6 5 4.5 4 3.5 3 2.5 2 1.5 1 = 17 sizes.
2 of each down to 5 where it is 3 of each size, the idea is you fill it up in good time,
and only need to look one place for drills while working, the smaller drills are often
used more, so they either brake or is worn down faster.
please post makes, it will make me happy.
Original STL all holes are 100% drill size.
Updated STL all holes are upsized, so drillbits should go in without a need of drilling first.
Another STL with top holes with chamfer, so it is easier to insert drillbits.