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Fairly small range of hole sizes though, surely? The only times I've needed a tube have been big gashes from sharp rocks.
Yes - usually 2.
As nickf above, Chilterns flints wreak havoc. Have had to use one on several occasions.
I've found superglue is quicker/cleaner/easier than the "cord" based repair kits to use for those smaller holes that wont seal.
the repair strips that plug holes from the outside are great for trail side repairs.
Surely those will only fix the sort of punctures sealant ought to do? Can't be any good for the sort of tyre tears which are the only times I've ever had to use a tube in the last 10 years.
These things? http://www.evanscycles.com/products/genuine-innovations/tubeless-tyre-repair-kit-ec028981
They plug bigger holes than sealant alone, and if your sealant is a bit old they do the job as well. Also had a bit of luck on small pinches with them that sealant doesn't seem to do much for.
The worst thing about tubeless is that if you do get a puncture that wont seal, it takes ages to check for and remove all the thorns and shit in the tyre before you can put a tube in...
have always carried one for the 5 years I have been tubeless but have only used one a few weeks ago which is still in because I haven't got round to replacing the rim strip I knackered getting it off.
The tyre split almost immediately stranding me miles from any where and I had to buy a new tyre I didn't like because it was all the shop had.
If i ride locally i dont tend to bother but for longer rides or races/ enduros i will carry 1 with a small tube of super glue. Never needed the tube but the superglue has come in very handy. Got a 1 cm slice in the body of tbe tyre from a piece of slate sealent had no chance. Dab of glue in the crack, wait a few mins and pump back up without taking the tyre off. Quicker than putting a tube in, andfar more relaxing. Did the last 20 miles no bother and patched the tyre when i got home.
That was last winter, tyre still fine and not leaking. Bonty mud-x if you were intrested.