not to jinx myself, but i declare down to the penny every time and always go well over my limit and usually double the liquor limit (4 bottles of wine pretty much every time...)...in the last 20 air/land crossings, i have paid once (on a land crossing going through a booth with a trainee).... and only got a secondary once at YYZ when i spent close to 1500 bucks on a 3 day jaunt to London....even then, it was how did you spend soo much, and i started pulling out the goods from my shopping spree.... mostly stuff that was just GST and PST able...but the guy doing the secondary just said go on your way....i think they smell honesty!