Faster Pulses with Spare Timers?

Thanks Gordon, all useful advice.

I was on v2.12, but have updated to v2.14 and seen an improvement in timings, although there'll still be one or two long pulses in a second's worth and it still doesn't quite go down to 20us. But I agree it's much improved and if I get fed up with fiddling with timers it's probably good enough to work with.

Thank you for the links re. hardware and examples, I'll have a read up on them.