By way of a follow-up to our split bristle vs. wrapped bristle discussion...
I just finished some "time trials." Understand that this is the first time I have timed myself on this procedure and while feel sure I could reduce the times a bit, with some practice, I ran the time trials to satisfy my own curiosity, not simply to burn through in the shortest possible time.
I can split a nylon bristle in about 45 seconds. I've done it in 30 but the smaller the diameter, the fussier it is and the longer it takes.
I can wrap a split nylon bristle in about two and a half minutes, call it 2:45. So altogether that makes three and a half minutes to do it the way I do. I have to wrap each leg of the split bristle but I don't have to wrap as closely as if I were using the pure wrap method. I'm sure wrapping two is a bit slower than wrapping only one, but I would guess only marginally so.
The result? I don't begrudge an extra 60 seconds or so to insure that my bristle never (virtually never) comes off. I say "virtually never" because through all of this, I am reminded of an old aphorism: "Anyone who claims that he never makes mistakes (never has a misfit, never loses a bristle), is either selling something or needs a better standard of success and failure."
And in that vein, I must confess that the real time sink in my method is in using unwaxed bulk poly. I have to cut to length and taper the thread. So, it takes roughly 15 minutes to do that...times two, that's 30 minutes to make a set of waxed ends. Add the time to split and wrap the bristles and you've got 45 minutes all told.
I don't mind it a bit...it's part of the "Art and Mysterie" but such times might be a caution for others less involved in the, shall we say, more esoteric aspects of bootmaking.