Yep, a zero. I did get some secondary DR and HA pops, but I did not count them. Also, the difference is that none of OD, PA or IS contribute secondaries to the other two's primaries. As in the example with C getting 12 pops on the inbred IS, ID and RB.
Record keeping was done by buzzer-manager.
Anyway I just got a level 6 trainer, to see what those 5% can do :)