bte I've used Dual monostables before, some can get you a pulse less than a 100nS, what i did was use both mono's, the first is used to delay the pulse, the second varied the pulse width, so when you have more than one chan then you can fine adjust the phase position of each pulse as well as each width. I can post the circuit if you are interested.
I went on to use delay chips which have a variety of flavours, 250ps, 1ns, 5ns, and you select using 8 bits, i first used dip switches but went on to build a controller.
I was able to get down to a 30nS pulse width and i could vary the phase in 1ns steps.
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