Ugh, that sucks Rudy and MoN!!!
For someone without a vise or drill press but with a cordless drill, an ice pick, and the normal assortment of hand tools, how would you suggest making the hole in the cap? I was thinking ice pick plus the tiny round diamond file until just big enough for the tube? I've used that to make holes in some kitchen stuff I have and it has worked well. Or do you have better suggestions? I know people have mentioned scissors but that doesn't seem like it would work that well to me.
+1^^^^
11/64" drill bit - make a little starter hole with pin or nail so the drill bit will drill perfectly straight down with no travel.