I just wasn't sure if you had ever blended King Arthur AP with Caputo 00 before.
Bryan,
The flour that is most commonly combined with Caputo 00 flour is high-gluten flour. That is the blend that is used by Dom DeMarco at Di Fara's in Brooklyn and that others try to replicate to get a finished crust that is close to the Di Fara crust. Sometimes bread flour is combined with the Caputo 00 flour when high-gluten flour is unavailable but with a different ratio to get a high enough total protein value. I have tried both of those combinations but I don't recall combining all-purpose flour and Caputo 00 flour, mainly because both of those flours are fairly low in protein and combining them doesn't yield a protein content that is close enough to the other flour combinations mentioned above. However, the possibility of combining all-purpose flour with Caputo 00 flour arose recently and was discussed at Replies 9 and 10 starting at
http://www.pizzamaking.com/forum/index.php/topic,9008.msg78017.html#msg78017. In that case, the member who asked about that particular blend ended up trying the blend and was satisfied with the results. It all comes down to what you like. A nice tool to do protein percent calculations is member November's Mixed Mass Percentage Calculator at
http://www.unclesalmon.com/tools/food.php. That tool will allow you to do different blends to determine which blend you like the best.
Peter