850k, 54 minutes, 1,552,144 point searches (duplicate detection) out of 2,626,357,610 non-coinbase points, for an actual average false positive rate of 0.0591%. Not too far off the ballpark estimate of cutting the full table calculation of 0.21% in half. Given that we know the actual buck distributions, and know that the sieve hash function is both independent and even, the full table calculation should be exact, but currently I'm only able to measure the cumulative rate, not the rate when the table is full.