Building an adobe oven

We're building a new clay oven, as our last one eroded faster than expected. This one's going very well, in part because we have good help. Our multi-national team has moulded the sharp-sand inner form, mixed sea-sand and clay, rolled the balls and pressed them into place over the sand-dome, all with pizzaz. Guess I'll call it a pizzaz oven.
Here are some pics. We're not finished yet, and at the same time we are preparing for tonight's hangi, the umu for which Simon has spectacularly constructed and lit. We'll all be tired tonight.