Given that the layer had to have the liability in the bank, obviously, otherwise he would not be able to make the offer, this is likely not just some $6 punter with a bank of a few hundred bucks. Still, for my liking, to pinch $6? 999 right and 1 wrong and you are out. May be a glitch in software or something similar?

Laying these type of long conveniences is fraught with danger; if not from anything else, then from the shock when one wins! Get a few go against you in short succession (wouldn't be impossible) and it's capable to break even the most determined, organized and consistent layer who may have a perfectly good method otherwise.

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Michal - Ratings2Win Pty Ltd
R2W Axis - Axis is Australia's leading horse racing software and database;
with sophisticated form analysis tools and accurate horse performance ratings for TAB meetings.
http://www.ratings2win.com.au/