hi there, i'm in the process of writing my own DAC scipt which is working all OK but i have one quibble which maybe someone here would be able to shed some light on... we all know the 500/min and 216000/day limits, but i'm just wondering how you stick to them? i mean, how do you tell your script to run for example, 500 times a minute? is it just a case of approximating an average response time for each reply and using that as a ballpoint figure or is there a "realtime" way of doing it that people employ? i understand people keep their secrets under their belts around these parts but any suggestions would be appreciated thanks. Jonno.