Yes, I ran a 0.3 mm bit through both the 3 mm and the 1.5 mm lengths. I got 2 lines through the drilled out 1.5 mm, but I was unable to do that on the drilled out 3 mm tube. After a break, I tried doing it with a 1 mm piece. I haven't been able to get two through that yet, however i forgot to run a 0.3 mm bit through it first. I will try clearing the tube with the bit when I go back to the shop.
On the up side, I'm getting darn good a picking up tiny pieces of tube with tweezers and putting them back in the little bag every time I try to shake out just one :-)
sp