Hello Russell
Something you are up against with the Clock Timer is that it using the standard OS timer - low priority and therefore not entirely accurate. If your App is only for your use, you may be able to optimise it to suit your requirements, but if you intend to distribute the App, different phones could differ in performance levels.
Why does your remote control have to send a value so fast? I assume there is more than one value, for different commands. Can you tell us more about your project on the hardware side? Are you using a microcontroller?
Our colleague Anke has developed an extension to yield better timer accuracy: