SeeDee
I sometimes use the NetPro system and send single bets via the batch file pick-up method. I usually do it about 30 seconds before scheduled race start without any problem, although I am not sure about heavy traffic periods. The bet usually gets lodged within a few seconds. You will have to test it out if you want to send your bet on start time.

My question.
Does anyone know if the new combined NSW/Vic TAB has an automatic batch file pick-up method similar to UniTab? I have looked through their help file and tried their Express betting but it looks as you still have to load the bet file manually or paste it in from the clipboard. I believe the Vic tab when operating alone had the auto batch file pick-up.