I really have to step into this spare tubular discussion here. I have been reading about UV rays degrading your spare tubular, about 'socks' (?), 'toe straps' (??), 'sew-it-yourself' (????), 'a few wrenches', and so on, and so on.
Now old school, and I mean really old school, would mean: no spare tubular at all. Just rely on good fortune! Why? Because a bulky something under your saddle cramps your style. And style is what counts.
OK, a little more sensible, you want to carry a spare. Just take any old, multiple repaired tubular, rubber band around it, and put it with leather toeclip strap under your saddle. Pull the strap as tightly as possible, because you want the guy behind you to have a good look at your muscular thighs.
OK, so now you flat (months and months after you put that spare under your saddle, because you've had that good fortune all the same). You undo the leather strap (with difficulty, cause it's really cold), you unfold the spare and a slight puff of dust rises from the dried out tubular. You put it on your wheel (fingers still smarting from pulling the flat oof of it), you pump it, sh***t, it won't hold air. You limp home.
That's old school!
(of course I haven't ridden on a tubular since ??? '85??)