Norm,
I cut my balsa into 1-2"square x 3-5" long blocks, mark the center of the blocks on both ends of the balsa and use a lathe type drill press set up to drill the hole. I usually use a very small drill bit like a 1/16" or 1/8", but they are long like 8-12" to drill the hole. At first I ruined a few pieces, but with trial and error I don't ruin anymore pieces now
FA,
Did you buy yours or find them? The ones I have are made by my father
Here's a closer look at them
Floater,
No, I have not used all of them, in case you didn't notice its kinda hard to use that Drennan Zeppler thats still in the plastic bag
I probably won't be using any of those floats, those are all part of my collection and I have plenty of other floats to use. For example the Fred Badjura cork floats, they are just too valuable to be used.